The Blood Feaster Staff is a Hardmode summon weapon. It spawns a blood zombie that chases after enemies to attack. After getting too far, the blood zombie minion will turn into a Drippler to fly and catch up. Like other minions, summoned Blood Zombies are invincible and follow the player for an unlimited amount of time, unless the player dies, summons a replacement minion, or cancels the buff. The Blood Feaster Staff is dropped by Blood Zombies and Dripplers (5% or 1/20 chance) during a Blood Moon after the Wall of Flesh has been defeated.
Its best modifier is Ruthless. The Mythical modifier provides the widest array of stat bonuses, but these primarily affect the initial summon rather than the resulting minion. Additionally, Minions cannot deal critical hits. The only significant advantage a Mythical Blood Feaster Staff has over a Ruthless one is knockback.