The Emphatic Untamed Calamity Mod currently adds 1 new boss to the game.
Goozma consists of a central core surrounded by 4 deities (Astral, Crystallian, Crimulan, and Ebonian) with 90,000 (96,000) health each. Goozma itself has 160,000 health in both Normal and Expert Mode. It can be summoned anywhere at any time with a Gelatinous Amalgamation.
Goozma drops Ionized Gel, Super Healing Potions and various gel/slime themed weapons. It drops the Gelatinous Core in Expert Mode, an accessory which pacifies all vanilla and Calamity Slimes, grants immunity to the Electrified and Distorted debuffs and provides a damage boost.
Draedon's Monitor is a Post-Moon Lord Mini Boss that spawns anywhere on the surface after Jungle Dragon, Yharon has been defeated. It will stalk the player until they approach the monitor, triggering its "Hostile State" and causing it to call 5 Auric Probes to its aid. Upon the last Auric Probes defeat, the monitor will attempt to flee from the player
- Bosses on the Calamity Wiki