Weatherseed Treefolk, Sneak Attack, and Phyrexian Altar

Prerequisites

• Weatherseed Treefolk in hand
• Sneak Attack on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Activate Sneak Attack by paying , putting Weatherseed Treefolk from your hand onto the battlefield
2. Activate Phyrexian Altar by sacrificing Weatherseed Treefolk, adding
3. Weatherseed Treefolk dies, returning itself from your graveyard to your hand
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers