Rhonas, Avenger of Amonkhet

Deathtouch, wither, indestructible
Rhonas, Avenger of Amonkhet can't attack or unless an opponent is playing a red, black, or blue deck.
{4}{g}: Destroy target noncreature, nonland permanent. Lands you control gain "If this card would become tapped, add {g} to your mana pool." until end of turn.