Revag, Golem of the Swamp

Artifact spells you cast cost {2} less to cast.
Hexproof
Trample
At the beginning of your upkeep, each opponent
sacrifices an artifact, land, or 1 life.
{1}{b}{g}: Create a 1/1 stone creature token with
Deathtouch and Vigilance. Revag, Golem of the
Swamp gains First Strike until end of turn.
{u}{g}: Revag gets +0/+2 until end of turn. Gain
1 life.