Imbued hear

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.

A player uses the Invigorate option on the imbued heart, boosting their magic level. Players can use the Invigorate option on the heart to temporarily increase their Magic level by 1 to 10 levels (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 cooldown resets on death, even in safe minigames such as Castle Wars. The quickest way a player can reset the cooldown is by traveling back and forth through the Clan Wars free-for-all portal (located in the Ferox Enclave).