Animar, Soul of Eternity

Devoid, Protection from Colors.

Whenever you cast a colorless creature spell, put a +1/+1 counter on Animar.

All colorless creature spells you cast cost {c} less to cast for each +1/+1 counter on Animar (this effect does not apply to generic mana).

All colorless creatures you control have annihilator X where
X is the number of +1/+1 counters Animar has minus five.