SPELL_BLOODBATH

Usage       : cast bloodbath
Accumulative: -
Duration    : Instantaneous
Level       : Level 26 Cleric
Mana Usage  : 50

If there is so much blood in the room that it says there has been a
bloodbath (10 kills) then a cleric can draw upon the blood and cast
a massive heal in the room. All players in the room will be fully healed!