Bloodlust (+10% damage per kill but -1 max heart per kill. Max Bloodlust of 3) is quite weak at the moment. Killing players makes it easier to kill and be killed, a similar effect to double edged. The benefit to bloodlust is sneaking up on players and chasing them down. If you have max bloodlust then you can deal a lot of damage. However, a player with a Power II bow can take you out very fast, and running is a lot harder since you won't have the extra 3 hearts to tank damage. Bloodlust doesn't always benefit the user but kits like Mans Best Friend and Smuggler always have an advantage, this makes it a lot more situational than those kits. Increasing the damage of bloodlust to 15% per kill would make it viable and would offset the low health debuff. Alternatively bloodlust could be changed to also include a small speed buff when you reach 3 kills, this would help you to escape other players. Bloodlust could also give an instant health effect per kill. Encouraging risky battles.