Right at the bottom I have included an up-to-date ability profile of abilities he can or is going to use. Not all of them are mastered only a select few. Some of the abilities will be used later down the track or re-learned.

Biscuit ends her training with Gon "Okay, let's take a ten-minute break. Next we'll start Emitter training."

Gon nods "Osu!"

Biscuit turns to Killua and I, yelling out to me "Hey lover boy!"

I ignore her as she continues to yells out again "I said Lover Boy! Daniel-Chan!"

I retort "Don't call me Lover Boy! I have a name Biscuit-kun! It's Daniel and please don't add Chan... I'm not cute!"

Killua retorts "I object that comment I think your cute..."

Biscuit looks at me "Aren't you going to tell Killua off?"

I shake my head "His an acceptation! So he gets to call me cute..."

Biscuit looks at me pissed "Fine then can you at least put Killua down?"

I object "Nope!"

Biscuit sighs "At least listen because this concerns you as well."

I nod "Ok."

Biscuit goes into a hand stand, balancing her body on one hand "Emitter training, level two. Elevation! You must maintain this stance, while staying perfectly still, and only by releasing aura."

Biscuit floats up into the air for a few feet after releasing some Nen.

She jumps back down, landing gracefully on the floor "If you can elevate around at least that high, you pass."

I muse "Around... give or take 10 feet."

Gon gets pumped "Okay!"

He makes his first attempt, floating up around 5 centimetres into the air.

Gon gets furious and keeps going at it, determined to beat this level of training.

I chuckle as Killua speaks up "That training is a lot harder, given that's only a level higher."

Biscuit turns to us "Naturally... Because this is a really level-five training."

Killua and I freak out "Level five?"

Killua continues "Are you sure you should skip levels like that?"

Biscuit sighs as she turns away "Well, it's a gamble. If it doesn't work, we'll have wasted the three weeks we were given. If we followed the proper sequence, he could reach level three easily. But that won't do him any good in actual combat. He needs an Emitter attack that can push an opponent back several meters with a direct hit. It must be strong for him to use it as a weapon."

Killua responds "So you jumped to Level five... but even if he clears the training, the ability to send enemies flying isn't a decisively lethal weapon."

I nod, snuggling into Killua "I think I know where Biscuit is headed... decoy, correct?"

Biscuit nods without turning around "Exactly right. It's only meant to give him more options."

Biscuit turns around "So have you made any progress on a plan? Or are you going to make out with Daniel for the next few weeks?"

I frown at Biscuit as Killua interjects "I can't do anything yet. First, can you tell me what your power is? My job will be easier with that information."

Biscuit lifts a fingers as her aura extends, creating a young female.

I muse in disappointment "If your ability is to make cute girls we're screwed!"

Biscuit glares at me "No! I'll introduce you to my power. Magical Esthetician Cookie-Chan. She specializes in providing massages of pure pleasure. She'll burn off excess fat and guide both your body and your soul to paradise. When her aura, transformed into special lotion, is applied to the skin, it makes your skin look younger. She can also use acupressure massage to cleanse your body internally. Constipation, stiff shoulders, chills... any anomaly you have will vanish!"

Killua and I blink in utter confusion.

Killua coughs, regaining his composure "That's it?"

Biscuit interjects "Of course not! She can also do chiropractic massages, meditative massages, rolling massages... And there's still much more!"

I respond "Killua... it's official... we're screwed!"

Killua blinks as he gets up to yell out Biscuit "ARE YOU AN IDIOT? THAT'S TOTALLY WORTHLESS!"

Biscuit retorts back "WHAT ARE YOU TALKING ABOUT? THAT'S THE MOST USEFUL POWER IN THE WORLD!"

I retort back "For what? Combating old age! We're here to fight people not old age!"

Killua nods "That is why you're just a stupid old hag!" Biscuit retorts back "I dare you to say that again!"

I chuckle lightly as Biscuit and Killua continue to bicker until they turn to me "What you laughing about?"

I blink in confusion, from hearing them in sync with each other.

I frown "I'm laughing at you two wasting time on fighting over a completely useless ability."

Biscuit retorts "It's not useless! Why don't you join Gon in training!"

Killua scrunches his hair in frustration "Ok change of plans! Daniel go do some training or something. I have to find a way to work around Biscuits useless ability!"

I frown "Ok, Killua! I'll leave you to it."

Killua puts his hand up to protest as I interject "No don't bother!... I would be just as upset if I found one of our key players ability is to fight aging..."

Killua sighs "Sorry..."

I smile "Don't apologise! I trust you can figure a way out of this mess."

Killua nods "Now... what are we going to do now?"

I leave Killua to think of a plan as I train by Gon's side.

11 days into training - 10 days left

Gon and I struggle to keep training. I'm slightly being ahead of Gon, but otherwise only getting half way before falling back down.

Gon falls over, collapsing on the floor as I jump up, still ready to keep training.

Gon sighs "It's not working..."

I frown "Just remember Biscuit's explanation!"

I cough trying to pull off my best impression of Biscuit "While training, see yourself firing a water pistol. You build up aura within your body, then shoot it from your palm! The greater your power, the stronger the aura you fire."

I lift a finger as I continue "You want to release all the aura you've kept closed up inside. The total amount of refined aura you apply to the attack, and the speed, power, and timing you apply to the release... You need all of those elements to land the attack you'll require."

Gon gets up scrunching his hair "It's too hard! I just don't get how you push the aura in your body out of your hand..."

I hear Killua laugh from behind me.

I turn around to see Biscuit pissed "I do not sound like that!"

I wave Gon off "Just continue to do your thing while I get scolded by Biscuit!"

I run up to Killua and Biscuit "So what did I miss?"

Killua interjects "Just Gon's progression... doesn't look like his made any progress for ten days."

Killua turns to Biscuit "I think you should have let Gon start from level two."

I nod "I think that would help Gon immensely..."

Biscuit interjects "We still have ten more days..."

We make our way away from Gon.

Killua objects "Only if Tsezgerra can deliver. In hindsight, it wasn't a very good deal."

I shake my head "While I would agree to an extent. Three weeks is better than one." Killua interjects calmly "If we give Team Tsezgerra Lucky Alexandrite, They'll only be missing two cards. We still need over thirty..."

Biscuit retorts "We can just take them from Genthru by force."

I object "Gon would never allow it..."

Killua nods "We still have to figure out how to defeat Genthru first."

Biscuit waves her hand "That's true."

Biscuit stops as she points out a rock "So is this big enough?" Killua nods as I look at a rock that possible could span for 1 kilometre. Killua nods "Yeah."

I turn to Killua speaking of plans "I have idea's for the last 3 deadly sins but I could only train one of them to a reasonable level..."

Killua nods "Some good news. Lay it on me."

I nod "Gluttony could be designed to steal away someone's aura."

Killua thinks "That could be a great idea..."

I sigh "I just have no idea how to pull it off..."

Biscuit thinks out loud "I think I know how you could pull it off. However, it depends on what you want to do with the aura afterwards..."

"To take it for myself."

"To difficult! Next!"

Killua sighs "Alright what else?"

I respond "Wrath bolster my attack at the cost of defence. So a reverse of sloth, and a lot less demanding from Pride..."

Biscuit responds "That could be a lot easier. I could even help you."

Killua sighs "But we have Gon for that... that's why his even training in the first place! What's your last idea?"

I respond "Envy basically copy cat someone else kind of like the copy card. It's a fake but it passes off for the real thing."

Killua smiles "That actually might work in our favour..."

Biscuit muses over the idea "It sound plausible and being a manipulator, transmutation or even enhancement type category... Let's hear your ideas first on how you could pull that off."

I nod "Basically another decoy nothing new there. The ability will be designed to replicate someone's voice, personality and looks."

Killua nods "That sound quiet good what else?"

I continue "I thought of the best conditions to pull them off. One, I have to know them personally or even met them. Two, the person that's being copied must be alive and three, I must steal some of their aura by touching them through skin contact."

Killua smiles "That doesn't sound too difficult..."

Biscuit nods "Very do-able Nathaniel did it all the time... He even..."

Biscuit cuts herself off as I look confused at Biscuit "What did he do?"

Biscuit responds "It's better if you don't know... actually the more I think about it, it sounds something like Vastorie would do..."

I nod "I think it would probably be better if I didn't hear it..."

16 days into training - 5 days left

I stand by Killua's side as he speaks to Biscuit "Don't you have any advice that could help him break through?"

Biscuit turns "Ok which one of you spoke?"

I point to Killua "The real Killua."

Biscuit sighs "I should have realised you voice is a dead giveaway."

I sigh "Well at least I got the looks..."

Killua pouts "No funny ideas!"

"I could never replace you..." I frown as Killua objects next "And it would feel weird sleeping with myself."

Biscuit chuckles "You really got Killua's looks perfectly you even got the little dimple on his chin."

Killua quickly checks my face as Biscuit laughs "Are you really that self conscious about your skin? Regardless back to the old topic about Gon. The sensation of aura flowing through the body is different for everyone. So, if I was to give him advice from my own perception and he makes an incorrect assumption, it could end up hurting more than helping."

My form shifts back as press the button sighing. Biscuit responds "How long?"

I answer Biscuit "Four minutes and 42 seconds."

Biscuit smiles "It's improving..."

I frown "I know but I need to be able to pull it off for at least 10 minutes if it's going to be of any use... and now I have to wait another day just to practice it."

Biscuit turns to me "You need to make sure the voice is also exactly the same, as for personality you just have pretend to be someone else. For the voice might I suggest Level 3 Manipulation training..."

I look at Biscuit "What's that?"

Biscuit responds "Aura focusing. Basically you focus your aura on one spot of your body to change it drastically. In this case, focus it on your voice box to alter your sound waves, and to change it to a different level."

I frown "That sounds easier said than done..."

Biscuit sighs "Like this..." Biscuit uses Gyo to focus around her voice box, increasing her pitch "Like so. You can increase the pitch and even the volume, or decrease it."

I nod "That actually it is easy after seeing it done..."

I repeat the process, speaking up "How's this sound..."

Biscuit responds shocked "You actually got it pretty dam close..."

Killua frowns "I do not sound like that..."

Biscuit retorts "That why I said close and not exactly the same."

Killua sighs "This is a waste of time... for Gon!"

Killua walks towards Gon "Gon... Time's up. Your training's over."

Gon frowns, getting up as he pouts "We still have five days!"

Killua places his hands on his sides "Change of plans. I came up with a plan for defeating them."

Gon fights back "But... But... Uh, well... I think I've almost got it. Maybe..."

Killua responds calmly "No, it isn't happening. And I can't use an unreliable technique in my plan... Give up."

Gon drops his head in defeat as I sigh "Gon, you're as convincing as a brick wall. What's the plan Killua?"

Killua lifts his hand, pointing to Biscuit "So the plan is..."

Biscuit smiles "To use this."

I grab the card from Biscuit, holding it up to my face "A giant rock... sounds heavy duty."

Gon looks confused "Huh?"

Killua smiles "You'll have to learn this the hard way. Until you get it down to perfection."

Ok so here is an updated list of abilities for Daniel. *Ahem*

Nen:

Manipulator

Shadow Bonds (Shadow Master)

Shadow Conjure

Using his shadows, he fuses his aura, creating an object. Merging the object with surrounding shadows makes it terrifying weapon. So far he can only use static shadows (Rocks, walls, etc)
So far he can only create three objects:

Scythe - A large scythe made out of shadows, it looks like a plain farmers tool. When merged with shadows from static objects, it becomes a fearsome weapon.

Spear - A simple spear used for piecing. Merging with shadows from static objects makes it a multi-tipped spear that is harder to block or dodge.

Mask - A terrifying mask which can be used to activate his specialist abilities.

Shadow Control

Although this isn't his specialty, he can issue other peoples bodies small commands. Sit, silence, turn around, etc.

To do this, he must merge his shadow with theirs, and it requires a fairly decent amount to activated it and a massive ability to keep it running.

Specialist

Seven Deadly Sin

A seven layered ability that requires a decent amount of aura to activate. All abilities requires him to utilize 90% of his total aura to activate it. The more he has stored, the more powerful it is.

After deactivating the ability he loses 90% of his remaining aura bringing him to complete exhaustion.

Once one ability is use he cannot use any of the abilities for another 24 hours.

Level 7 - Lust

Creates a small shield around a target, protecting them from all incoming attacks.
While this is active he is in Zetsu, unable to protect himself from any incoming attacks. If he is taken out, the ability becomes forfeit. Total time is 30 mins (2 hours when an adult.)

Level 6 - Gluttony

Daniel demands a named person in the vicinity.

The person aura is sucked out completely, regenerating the users aura levels. However, the aura cannot exceed his maximum levels.

E.G. Daniel has a power level of 1000 and the traget has a power level of 2000. Daniel has currently 200 remaining while the target has 1200 remaining.

When used, the target has 0 remaining while Daniel has 1000.

Gluttony has a one use upon activation so choose wisely.

Level 5 - Greed

Creates a small field of multiple weapons, randomly generated. Around 5 - 15 weapons are created depending on the size of the weapons. Out of the weapons created 1 - 2 of them are actually strong enough to use a weapon. Each blade can only be touched by him.

If someone else touches it they burn as if it was made out of acid, eating away at the person's aura. Once a weapon is broken, he loses half the aura while the other half fortifies the remaining weapons.

Level 4 - Sloth

God mode. Once the ability is activated his immortal until deactivated. At the same time he cannot hurt anyone, and is slowed down to a walking tank. The ability cannot be used as an escape tool and is designed for more decoy. The total activation time is a maximum of 10 minutes (1 hour when his an adult).

Level 3 - Wrath

Daniel's aura is split to his hands and feet, allowing to dish out more damage, at the cost of his defence.

He can block using his hands and feet. However, if any other body part is hit, he suffers full damage.

Level 2 - Envy

Daniel is able to completely copy one person's personality, voice and looks.

The ability is designed for under cover sabotage and two requirements must be fulfilled.

One, Daniel has to know them personally (Met them).

Two, the person that's being copied must be alive.

Three, Daniel must steal some of their aura by touching them through skin contact.

The copied person's Nen abilities or knowledge can't be copied. Also no attacks can be used wile this ability is active.

Level 1 - Pride (Last Resort)

Daniel commits suicide, releasing his aura like a giant bomb.