Potion Slot

Game term

Use potions during combat to gain bonuses or hinder enemies.

Potion slots sit in the top bar and hold one potion each; relics can add more slots.

Start: 3 slots at the run's start, 2 at Ascension 4 (Tight Belt).
Use: clicking a potion drinks it. 58 of the 63 potions are combat-only; 4 work anywhere (Blood Potion, Fruit Juice, Entropic Brew, Foul Potion), and Fairy in a Bottle fires itself when you would die.
Full slots: a new potion must be drunk or left on the spot, and any potion can be thrown away from its slot at any time.
Reward roll: base chance 40%, rising 10 points each miss and falling 10 points on a hit; Elite fights add 12.5 points.

Worth knowing

Slot relics: Potion Belt (2 more slots), Phial Holster (1 slot and 2 potions), Alchemical Coffer (4 filled slots), Delicate Frond (refills empty slots each combat), Sozu (no potions at all, for 1 Energy per turn). Potion makers: Alchemize procures a random one, Lost Coffer gives one on pickup. Fairy in a Bottle and King's Courage are examples of the automatic and the combat-only kinds.