http://www.wowwiki.com/Rotface
Dealing with these two elements is the key to this fight. In decreasing intervals, a random raid member gets Mutated Infection. This debuff ticks for some damage for 12 seconds, and then spawns a small Ooze with 500k aggro on the formerly infected player. Whenever any two Oozes get within 10 yards of each other, they automatically combine
Именно так и реализовано в ядре