Master Key is a pickup in Daydream all Day, a mod for The Binding of Isaac.

Color Purple

Slot Upper Limb

Main Effect
Isaac's key will not go below 5. Pulls all types of keys towards Isaac.

Negative Effect
Picking up key deals half heart self damage to Isaac (cannot kill Isaac) !

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Heat Gain: 250 per trigger.

Upgrade Effect: Isaac's key will not go below 10.

• Download Daydream all Day from the Steam Workshop.