Issa grew a few feet, all his muscles started to bulge, and his energy was skyrocketing.
"Moka… I'm scared." said Yukari.
"Father is the most powerful vampire I know, and he's never had to transform to defeat anyone!"
"I think that's because no one's ever really challenged Issa before." said Ruby "Well… not since your mother."
"That's not important. What's important is that if we don't do something Tsukune is going to get himself killed!" said Kurumu.
Two huge bat-like wings burst out of Issa's back, then his hands transformed into claws. In a matter of moments he had transformed into a hideous demonic humanoid bat creature. All the while Tsukune just stood by and watched.
"Ah, I forgot how good this felt… Tell me boy…" said Issa in a deep booming voice "Are you intimidated by what you see? I may not win any beauty contest, but I'll rip you to pieces!"
"… Is that all you got?" asked Tsukune unimpressed.
Issa didn't answer with words; instead he flew at Tsukune like a bullet and slammed him in the gut. Tsukune quickly realized that he had underestimated Issa's transformation as he felt one of his ribs snap and coughed up a lot of blood. He didn't get a chance to get his bearings because Issa kicked him in the chin and sent him across the room and into the wall.
"Okay… just give me… ugh… just give me a moment."
Issa wasn't going to give Tsukune's regenerative Super Ghoul blood the time it needed to work its magic. As the mammoth bat creature flew at him Tsukune forced himself to get up despite the pain to block or dodge the barrage of punches and kicks, eventually he managed to grab Issa by the wrists and started to squeeze, but then Issa kicked him in the pelvis to shake him loose.
"Oh… shit… no freaking way…"
Before Tsukune could crumble to the ground Issa kicked him in the face and sent him into the wall again.
"Oh my god… I didn't plan for this… But I'm… not… giving up… I have to do this… for Moka. But if I keep fighting like this I'm going to get pulverized… Scratch that, I'm going to get pulverized even more… Wait… I know."
Tsukune turned invisible. Much to Issa's annoyance he couldn't find him even with his further enhanced senses.
"Anger clouds my judgment… It's been so long since I've had to transform to defeat an opponent… But this boy is either very determined or very stubborn… It's annoying that even at full power I can't go all out to beat him…"
Issa's didn't have time to complete his train of thought because Tsukune reappeared and grabbed him from behind, but Issa just beat him off with the back of his head, then he turned around and kicked him in the face with both his feet.
"Tsukune!"
When Tsukune hit the floor Issa got on top of him and was about to slash him with his claws, but Tsukune punched him in the face and blasted him off with a shockwave.
"Okay… If he wants to play hardball… I'm going to play dirty."
Tsukune rushed over to the other side of the room and started searching the rubble for his sword.
"Yes!"
Tsukune hadn't gotten his sword back a minute too soon, because Issa had just gotten back up.
"Stay back!"
Issa just laughed.
"You think that piece of metal scares me? I don't need a weapon to kill you."
"I'm warning you!"
Issa came flying at Tsukune. Though he managed to score a couple of wounds across his chest Issa looked like he didn't even feel it.
"Alright… Let's see if he feels this!"
"AGH!"
"Daddy!"
"Moka, whose side are you on?" asked Mizore.
"He's still my father!"
"And what do you care?" asked Kurumu "If Tsukune wins that means he'll be free to marry Moka!"
"Doesn't mean I want him to die."
"… Touché."
Tsukune had stabbed Issa through the left side of his abdomen and the sword came out the other side, but Issa was actually laughing.
"Nice move boy, too bad your aim needs work; you missed all my vital organs."
"What?"
"You've got to be kidding me, all of them?" exclaimed Ruby.
"This is crazy! He's not even breathing hard!" said Yukari.
"I hate to admit it… But I actually did that…."
Tsukune didn't get to finish his thought because Issa punched him in the gut and ripped the sword out of his chest.
"Oh God…" thought Tsukune as he felt warm blood trickling down the side of his head "Please don't let me die here… I've gone through too much trying to get close to Moka just to fail now."
Once again Tsukune somehow forced himself to get back on his feet, but when he did Issa was nowhere to be seen.
"Crap… Where is he? Wait… He's right behind me, isn't he?"
Tsukune's question was answered by a huge pair of arms grabbing him from behind. Tsukune felt another one of his ribs going.
"Shit…No… I am not going down! I've almost died a million times over the years… all because of Moka… I won't let her down now!"
Thinking quickly, Tsukune stuck his claws into the wound on Issa's chest.
"AAGGHH!"
With Issa's grip loosened, Tsukune managed to blow him off with shockwave, but when he hit the ground he found himself unable to stand up.
"Come on… get up… get up before he…"
Too late, Issa was already back and stomped on Tsukune's back, he felt the nails on Issa's feet digging into his skin.
"TSUKUNE!"
Issa must've heard his daughter's scream, because he took he didn't stomp on Tsukune again.
"You're beaten boy, it is useless to continue, surrender and admit that you will never be worthy of my daughter's hand and I will let you live."
Tsukune couldn't believe what he was hearing. Unlike all the other boys at Yokai Academy that he had known, he would have never forced Moka to do something she was uncomfortable with. Sure he had some perverse thought every now and then, but that was only natural for boys his age. When he had first realized that Yokai Academy was a school for monsters he choose to stay despite the danger, not because he wanted to get laid, he just wanted to be Moka's friend, and in time those feelings had blossomed. He had even relinquished his humanity and become a monster all because of her.
"Go… to… hell."
"What did you just say to me?"
"I said, did you hear about the ugly, stuck up, prejudiced monster that couldn't hear!"
Issa grabbed Tsukune by the legs and threw him across the room, and then he jumped into the air and stomped on his legs before kicking him into the wall. Suddenly…
"STOP IT!"
Before anyone could move, someone came flying over Moka and the others and smashed through the wall that was preventing them from entering the room.
"STOP IT! LEAVE HIM ALONE!"
"Kokoa?"
"This is none of your concern Kokoa." said Issa "Why do you disturb us?"
"Leave him alone! This wasn't supposed to happen!"
"What is she talking about?" asked Kurumu completely confused.
"I did it! I'm the one that told the snow lady about the law!"
"You did what!"
"I'm sorry! I just didn't want him take my onee-sama away from me. I didn't know he cared about her so much! He was supposed to give up on her; you weren't supposed to beat him to death!"
"Yes, he was supposed to marry my Mizore instead."
"You mean my Kurumu!"
"Will you two shut the hell up?"
"ENOUGH!"
As soon as Issa had finished yelling, the room immediately fell silent.
"It doesn't matter who told whom about the law, it is still the law. This boy has failed to prove in my eyes that he is a worthy suitor for my daughter, and whether it be bravery or foolishness he has challenged me for the right to take her hand. He has refused to surrender, so to prove he isn't worthy he must die."
"What do you mean he isn't worthy? Look at all he's done for her!" said Yukari "All those other boys at Yokai Academy were just a bunch of masturbating assholes who are afraid of commitment, when Tsukune says he loves her he means it!"
"No he doesn't, he's just confused." said Mizore's mother.
"You stay out of this!"
"You haven't even grown into your breasts yet!"
"This bickering is pointless. What makes you think your daughter is capable of passionate love with my Kurumu's Tsukune? She'd melt into a puddle before he even took his pants off."
"You had sex with a sex with backup dancer!"
"Oh my god, that was one time!"
"Mom?"
"What can I say, he was kinda sexy."
"I SAID ENOUGH!"
"Yeah, you're giving me a headache."
"Tsukune?"
Tsukune was back on his feet, apparently Kokoa's little confession and the following fight had given his Super Ghoul blood the time it needed to do its thing. He was standing up with his hands in the air.
"Issa Shuzen, I've proven my metal over these past few years more times than I can count, but for some reason you still don't think I'm good enough for your daughter, but somewhere in my heart I know that I am… I didn't want to do this… but you leave me no other choice… So I guess it's time to throw in the big gun."
"What are you talking about?"
"Something I hoped I'd never have to use… something that could mean the end of everything… The Black Death Ball!"
"Black Death Ball?" thought Moka.
"I've never even heard of that attack."
"You bluff!" belowed Issa.
"Do I?"
Moka was the first to notice, Yukari was staring at something and looked like she had seen a ghost.
"LOOK! UP IN THE SKY!"