Near-infinite lifelossNear-infinite lifegain triggersNear-infinite creature ETBNear-infinite creature LTBNear-infinite death triggersNear-infinite creature sacrifice triggersNear-infinite card drawNear-infinite draw triggersDestroy all creatures opponents controlDestroy each creature that enters the battlefield under an opponent's controlInfinite -1/-1 countersLock
How it works
Activate Yawgmoth by paying 1 life and sacrificing a creature, targeting any creature an opponent controls, putting a -1/-1 counter on a creature an opponent controls, and causing you to draw a card.
Hapatra and Obelisk Spider's second abilities trigger.
Resolve the Hapatra trigger, creating a 1/1 Snake creature token.
Resolve the Obelisk Spider trigger, causing you to gain 1 life and each opponent to lose 1 life.