RTF is a global modification that replaces all towns in the game.

By the way, doesn't Tank have a "Unique ability"? Yes? Which isn't used by anyone else? 🤔
I think he has an explosive attack...

Yes, he has an explosive attack, deals damage with fire magic, its damage increases with the Phoenix Feather Cloak and the Order of Fire, and his aura of vulnerability buffs him, but there's also a bug - if you kill an enemy with an attack, the explosion won't damage nearby enemies.