Knowledge is a system in Basement Moon, a mod for The Binding of Isaac.

A keyword with separate Potency and Count, each capped at 10. Potency appears to the left of its icon and Count to the right.

Grants +1 luck per Potency.

An enemy's death has a 10% chance to remove 1 Potency. Spending a key removes 2 Potency per key spent. Taking penalty damage removes 5 Potency and hides up to 10 revealed rooms on the map. Clearing a room removes 1 Count.

Its effects and remaining values persist after dropping the trinket that granted it. Potency and Count can reach 0 independently.

• Download Basement Moon from the Steam Workshop.