Blacken Heart

+2: puirfy with blackness.- Give one creature flying and two +2/+2 counters.
-4: Rain of the daggers. - every creature on the field takes X amount of damage which is demand by the amount of loyalty you have after paying.
-10: The call. - Summon X amount of 4/6 Black Angels with flying where x stands for the amount of mana used to play this card.