Tireless blood essence is a pocket item that has 1000 charges when newly made. Each use will provide the player with 15% Adrenaline and take a varying number of charges (50-52). In addition, this item shares a cooldown with other Adrenaline boosting items. The cooldown for this item is 2 minutes.
This item can be created by adding 100 Congealed blood to a Super restore (4). The player also requires a minimum of 500 cremated Vyre corpses.
The recipe for this item is described in the Haemalchemy (Vol. 2) book.