Hapatra, Vizier of Poisons
Yawgmoth, Thran Physician
Obelisk Spider

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
You control at least one additional creature. Your life total is at least 2. An opponent controls a creature.

   Steps

How does this combo work?
1
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.
2
Hapatra and Obelisk Spider's second abilities trigger.
3
Resolve the Hapatra trigger, creating a 1/1 Snake creature token.
4
Resolve the Obelisk Spider trigger, causing you to gain 1 life and each opponent to lose 1 life.
5
Repeat.

   Results

What do I get from this combo?
Near-infinite lifeloss
Near-infinite lifegain triggers
Near-infinite ETB
Near-infinite LTB
Near-infinite death triggers
Near-infinite sacrifice triggers
Near-infinite card draw
Near-infinite draw triggers
Destroy all creatures opponents control
Destroy each creature that enters the battlefield under an opponent's control
Infinite -1/-1 counters
Lock
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