Teridax, Lord of Shadow

Incomprehensible Evil - At the beginning of your
upkeep, if you control creatures with total power 6
or more, Teridax deals 1 damage to each opponent.

Mutable Form - Teridax gains +2/+0 and flying
until end of turn if you pay {4}.

All According to Plan - When Teridax leaves the battlefield, each opponent loses life equal to this
card's power. When this happens, Teridax's owner
may return Teridax to their hand.