Crovax, Ascendant Hero, Grim Poppet, Painter's Servant, Antler Skulkin, and Ashnod's Altar

Prerequisites

• Crovax, Ascendant Hero on the battlefield
• Grim Poppet on the battlefield
• Painter's Servant on the battlefield
• Antler Skulkin on the battlefield
• Ashnod's Altar on the battlefield
• "White" chosen with Painter's Servant
• available

Steps

1. Activate Grim Poppet by removing a -1/-1 counter from it, targeting another creature
2. Repeat until Grim Poppet has no -1/-1 counters on it
3. Activate Antler Skulkin by paying , giving Grim Poppet persist until end of turn
4. Activate Ashnod's Altar by sacrificing Grim Poppet, adding
5. Grim Poppet dies, triggering its persist ability, returning it from your graveyard to the battlefield with a total of four -1/-1 counters on it
6. Repeat

Results

• Infinite -1/-1 counters
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers