Ultra Bosses

Dormammu
Requirements: Full Infinity Gauntlet.

HP: 40 B

Reward: Endgame zone and Iron Buster inside it

EVERY BOSS IS LOCATED IN ULTRA BOSS PAD IN MAINZONE

Mysterio
Requirements: Full Infinity Gauntlet

There are 2 difficulties for this boss.

100B health

Easy mode: Defeating it with any gauntlet (upgraded spider etc)

Hard mode: Defeating it with Full Infinity Gauntlet

Reward for easy mode: Venom Glove in Endgame zone

Reward for hard mode: Carnage Glove in Endgame zone

Hela
Requirements: Full Infinity Gauntlet

There are 2 difficulties

Easy mode: Defeat Hela with Infinity Gauntlet

Hard mode: Defeat Hela with Quantum Glove

Reward for easy mode: Scorn Glove in Endgame Zone

Reward for hard mode: Golden Buster in Endgame Zone