Gives Isaac an extra life. Upon death, he will respawn in the previous room with full health and lose the 1up!.
Quote
"Extra life"
Effects
Grants an extra life.
On resurrection, the mushroom that follows Isaac will disappear and Isaac will respawn in the previous room with all his previous Red Heart containers at full health.
If Isaac has no Red Heart containers, he'll respawn with 1/2 Soul Heart instead.
The 1up! mushroom begins following Isaac like a familiar upon pickup, but doesn't do anything.
This item belongs to the Fun Guy set. Collecting three items from this set will transform Isaac into a walking mushroom.