Plague of Vermin, Grimgrin, Corpse-Born, and South Wind Avatar

Prerequisites

• Plague of Vermin in hand
• Grimgrin, Corpse-Born on the battlefield
• South Wind Avatar on the battlefield
• available

Steps

1. Cast Plague of Vermin by paying and choosing to pay any amount of life, creating that many 1/1 Rat creature tokens
2. Activate Grimgrin by sacrificing a Rat
3. When the Rat dies, South Wind Avatar triggers, causing each opponent to lose 1 life and you to gain 1 life
4. Resolve the Grimgrin ability
5. Repeat from step 2 as able

Results

• Near-infinite +1/+1 counters on a creature
• Near-infinite creature ETB
• Near-infinite creature LTB
• Near-infinite creature sacrifice triggers
• Near-infinite creature tokens for all players
• Near-infinite death triggers
• Near-infinite lifeloss