Previously on the changing tide

Rowena replied "The spell which Professor McGonagall cast had caused every founder to be here permanently without many damages or consequences. I would love to be here to see the changes to the school's education and to settle down here."

Hermione nodded her head and said "But how do we get out of this cave?"

Regulus and Merlin answered "As soon as you three have recovered , we will set off immediately. We have pinpointed the source of the portkey to be the diadem as a way back to your dimension. However it is cursed and will put up a fight before we are able to get to where we want to be."

Harry asked "But where will the diadem be?"

Merlin answered "It will definitely be at the center of the caves being guarded by the Inferi."

*The story continues*

"We will never make it back to your dimension at this rate if anyone in the group doesn't know how to do a fire charm casted spell. Besides we will need to practice the flame charm before we can attack the source to send us all back to your dimension." Merlin said while looking at Rowena and Helga.

They both sighed and agreed with Merlin that it was the best thing to do.

Everyone decided to split into three teams. Hermione, Luna, Lee Jordan in the first team, Harry , Ron and Neville in the second team. Rowena and Helga and Regulus in the third team.

"May I ask why am I doing this? I know and I am able to produce the flame charm perfectly ." Helga said.

"We thought since we know how to do a flame charm, I was thinking of exploring deep into the depths of magic on how to improvise using a flame charm if the flame charm is insufficient." Rowena and Merlin replied.

"Arghhhhh! That hurts like hell! " someone shouted in pain. Everyone stopped what they were doing and went to assess the injury. Harry started to keep apologising over and over again .

"What happened?" Regulus asked sharply with his wand being on the alert

"It was my fault. Neville and Ron ambushed me from the sides while I was trying to get the flame charm right. I was surprised by the ambush but large black flames suddenly erupted around me and burned them badly before they could get away." Harry responded

"Large black flames?" Merlin asked while deep in thought. " Let me see the burns and examine the burn mark." Merlin's eyebrow rose in surprise.

"Wow. This is truly unexpected. I never thought you are a shadow mage. That explains the black flames erupted around you." Merlin said as he had started to heal Nevillle and Ron. "Maybe I should do a quick check just to be sure." Merlin waved his hand around him and was stunned by what he had seen.

Regulus however, took this as a bad sign and started to fuss over Merlin and ask what is wrong. That got Merlin annoyed really quickly.

"Regulus! Enough! I know that you are scared for me. But I assure you that this is good news." Merlin said. "It seems like the young ones have quite a potential to be elemental mages."

"What!?" Rowena and Helga exclaimed. The rest however were confused.

"It means you have an elemental power deep inside you which you can unlock using your concentration which you can use it to your advantage and convenience." Rowena explained.

"But how do we practice that power? We do not have a teacher who can teach us even the basics" Hermione questioned.

"You are wrong about that Hermione. I can teach you how to control it. I am a storm mage." Smiled Merlin.

"What? How do you know who has what type of elemental power?" Hermione challenged.

Merlin merely laughed and said "There is a spell invented a long time ago which shows what kind of mage he or she will be. I'm surprised that the spell is lost over the centuries. Based from my spells; Harry is a shadow mage which controls dark abilities, Hermione is an ice mage who can control ice abilities, Neville is an earth mage who can shift the earth and do massive damage if he is not careful enough, Luna is a light mage who can blind or attack her foes, Lee Jordan is a fire mage who can cast spells without getting tired at all"

Merlin looked at Harry and realised that Harry had a depressed expression on his face . Merlin telepathically said to him "Being a shadow mage does not mean that you are a dark wizard Harry, You can use your skills to survive and hide while saving lives at the same time."

Harry jumped and snarled at Merlin" Are you using legilimency on me!?"

Merlin slowly backed away with his hands up "Hey now, I am not using legilimency on you because I can tell from your expression, so put your wand down before your spells get out of control."

Harry took a few deep breaths and lowered his wand. Merlin noticed this and said "Maybe I can teach you all the spells based from your elemental abilities which are necessary to survive."

"How?"Harry asked. Merlin asked all the elemental mages to gather in front of him placing his fingers on them including Harry.

Suddenly everything flashed in a bright light which blinded Harry's vision.

Back at Hogwarts

Professor McGonagall was slowly stirring in her coma and slowly began to wake up. Poppy was extremely happy that she had managed to beat the chances of not being able to make it through the war.

"Minerva! Thank Goodness that you are awake! I was beginning to lose hope that you would ever wake up!" Poppy said.

"Ow… my head feels like a ton of elephants are stamping around my head and dancing around on it. What happened?" asked Professor McGonagall.

"It is a long story but after you managed to rescue Remus from being overrun by Death Eaters, you were hit by a spell to the head and hit your head on the stairway. Tonks sent a patronus to me saying you need medical attention but was cut off when Bellatrix attacked Tonks. Helga had manage to push or you can say slammed her out of the castle with her wards when she was around the corner of the corridor which Tonks was fighting Bellatrix. Right now Tonks and Remus are in a healing coma. They will need some time to recover due to the spell damaging the internal organs in their bodies." Poppy explained.

"Where is Helga? I would like to thank her for saving Tonk's and my life." Professor McGonagall asked.

Madam Pomfrey's smile started to fade.

"What's wrong ?" Professor McGonagall asked. "After you went into a coma, Helga and Rowena had a mission on increasing the security and wards of the castle. But they disappeared along with a handful of students after receiving a distress call from one of our students." Poppy explained.

"Which student had sent out a distress call?" Professor McGonagall asked.

Poppy Pomfrey looked at Professor McGongall and replied "Harry Potter."