Lightning Ability!

From MC's perspective:

After confirming that the rune was flickering for real. I accepted the scroll from his hand.

Gasp~

Rebecca gasped internally. She looks at Zack with complicated emotions. She doesn't understand why Zack took this condition.

Franklin Madden grinned ear to ear. Finally, the annoying brat is going to die under his faction member's hands.

In that way, they can redeem the lost reputation of the Flame faction. When the duel was over. The Flame Faction can go back to their old days.

So Franklin already starts imagining the bright days ahead.

The Supreme Elder sighs inwardly. Somehow he has managed to convince this kid. Hereafter the Giant Tower Headmaster won't trouble him.

Then Dean Rebecca took Zack back to her cabin.

Shortly after, 

When they returned to the dean's office. Rebecca started asking her a barrage of questions.