Artificial Selection

0: Opponents create a legendary "Upkeep" token with hexproof, Cumulative upkeep, and "If this artifact is destroyed, you lose 40 life".
+20: Create X 1/1 servo artifacts tokens with Annihilator X and haste, where X is a number you choose. Exile them after this turn is over.
0: Your life total is reduced to 1 and is only affected by combat damage. Cascade 30. Lands drawn are put onto the battlefield. Exile this card.