The Gnarled Woodsprite is an unlockable Equipment in Risk of Rain 2.
Unlike other equipment, the Woodsprite is constantly active, healing the player at a constant rate of 1.5% max life per second. Activating the item will send the sprite to an ally, and heal them for 10% their max life. Activations have a 15 second cooldown.
Completing the Challenge One with the Woods unlocks this item.