No. Hela is the last boss (actually the dragon turns into her when u kill her dragon shape). Hela is super powerful with the super ability to remove one opponent from the battlefield. The mana is very slow though… but she can get rid any opponent she wants. Insanely OP and no hero can counter her. U must kill her before she charges 5 times and remove all ur heroes from the battlefield.
Nope revive scroll doesn’t work as ur heroes are removed and not killed.
“Black hole” is the name of her specials.