Elditch Commander, Chikyu

+2: Create a colourless token copy of target creature, it loses all abilities and is a 2/2 Cultist in addition to its other types.
-4: Elditch Commander, Chikyu does 1 damage to target for every colourless non-land permanent you control
-12: Destroy all non-colourless creatures, they return to the battlefield under your control, except they are a colourless Cultist with no abilities.