Rex Igneous of Umber Tor

Mountainwalk, Menace
Whenever an opponent casts a creature spell,
they may pay {1}. If they don't, create a Treasure
token.
{x}{x}{b/r}{g}, {t}: Destroy target basic land. Each
creature your opponents control take X damage.
If one or more creatures died this way, their
controller discards a card at random.