Jiru, Contraption Master

+2: Assemble two Contraptions(Put the top card of your library onto the battlefield face down as a colorless artifact Contraption with no abilities.)
-3: Sacrifice two Contraptions. Destroy target land an opponent controls.
-8: You get an emblem with "Contraptions you control have 'Sacrifice this permanent: Deal 5 damage to target creature or player.'"