Sneak Attack, Stormfront Riders, and Phyrexian Altar

Prerequisites

• Sneak Attack on the battlefield
• Stormfront Riders in hand
• Phyrexian Altar on the battlefield
• You control at least one creature
• available

Steps

1. Activate Sneak Attack by paying , putting Stormfront Riders from your hand onto the battlefield
2. When Stormfront Riders enters the battlefield, its first ability triggers, returning it and any other creature you control from the battlefield to your hand
3. Stormfront Riders' second ability triggers twice, creating two 1/1 Soldier creature tokens
4. Activate Phyrexian Altar by sacrificing a Soldier, adding
5. Repeat

Results

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