World Waster

Menace, Annihilator 6, Rampage 2 (Whenever this creature becomes blocked, it gets +2+2 until end of turn for each creature blocking it beyond the first.)

If a permanent you control would add coloured mana, you add {c} instead of it's normal type and amount.

Other colourless creatures you control get +1 +1

At the beginning of each endstep you draw X cards and lose X life, where X is the number of creatures with one or more colours that died or were put into exile from the battlefield this t