Ambrosia

Ambrosia is a rare potion exclusive to the Watcher that immediately enters the Divinity stance when used. Divinity is the Watcher's most powerful stance, granting 3 extra Energy for the turn and causing all attacks to deal triple damage. It is obtained through enemy drops, shop purchases, or events, and is among the rarest and most powerful potions in the game.

Ambrosia is extraordinarily powerful because it bypasses the usual prerequisites for reaching Divinity — normally achieved by transitioning from Calm through Wrath via specific cards. Using Ambrosia, you can enter Divinity for free from any stance on any turn, immediately granting 3 bonus Energy and tripling attack damage for that turn. This is one of the highest single-turn damage ceilings in the entire game. Paired with a hand full of heavy attacks and Energy, a single Ambrosia turn can deal hundreds of damage, capable of killing even act 3 bosses in a single round. It is best saved specifically for the most dangerous boss encounter in the run.