Thastos, Cult Thaumaturge

Partner with Koroz, Rakdos' Vengeance
Whenever another creature enters the battlefield
under your control, Thastos deals 1 damage to
each opponent.
At the beginning of combat on your turn, you
may discard a card. If you do, draw a card and
create a 1/1 red Elemental creature token with
haste.