Annoyed Me

While you have at least 5 Sibling creatures with
different names on the battlefield or in exile
Annoyed Me receives +7/+7 and has Annihilator5
and Headhunt (When this creature deals combat
damage to a player it deals X more damage to that
player, X is equal to its converted mana cost)
-AAAAAAGH! I'M TIRED OF YOU 5!
JUST LET ME PLAY IN PEACE!