LV 426

0: When a land enters the battlefield, a Xenomorph Horror enters the battlefield. Xenomorphs attack together and one player at random.
0: Chaos: 1 creature under your control is exiled. If there are no Xenomorphs on the battlefield, return exiled creature to controller.
0: Plainswalk: All creatures exiled by LV 426 are placed in the graveyard. For each of these creatures, place a Xenomorph on the battlefield.