Imbued heart

The imbued heart is a magic-boosting item dropped by superior slayer monsters, which are rare encounters unlocked after purchasing the unlock Bigger and Badder for 150 Slayer reward points from any Slayer master.

Activating a Vecna skull temporarily raises the player's Magic level by 2-10 (1 + 10% of the player's level, rounded down). It can be activated an infinite number of times, but it can only be activated once every seven minutes per player, regardless of how many imbued hearts are owned.

The boost will not work while your magic level is already boosted by any other effect. Players additionally cannot bring the Vecna skull into the Duel Arena to gain an advantage in magical duels if the "no potions" option is enabled.

When you click on the "Draw power" from the Vecna Skull, a message appears in your chat box saying "The skull feeds off the life around you, boosting your magical ability."