Khayrat, Ifnir Awakener

{r}{g},{t}: Discard, then draw a card. You may
play an additional land this turn.

Sacrifice X lands, {t}, Exert Khayrat:
X target creatures you control gain haste and wither until end of turn.(They deal damage to creatures in the form of -1/-1 counters.
An exerted creature won’t untap during your
next untap step.)