Emeraldyre, Ixalan Juggernaut

Trample, reach, vigilance, hexproof
As long as you control six or more lands, creatures you control are indestructible.
Discard a card: Target creature gets +1/+1 until end of turn.
Sacrifice a land: Add {c}{r/g}.
{2}{r/g}, {t}: Search your library for a basic land card, and put it onto the battlefield.