Skullwinder, Cloudshift, Sedgemoor Witch, and Phyrexian Altar

Prerequisites

• Skullwinder on the battlefield
• Cloudshift in hand
• Sedgemoor Witch on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Cloudshift by paying
2. Sedgemoor Witch triggers, creating a 1/1 Pest creature token
3. Resolve Cloudshift, blinking Skullwinder
4. Skullwinder enters the battlefield, returning Cloudshift from your graveyard to your hand and causing target opponent to return a card from their graveyard to their hand
5. Activate Phyrexian Altar by sacrificing the Pest, adding
6. The Pest dies, causing you to gain 1 life
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite storm count
• Target opponent returns all cards in their graveyard to their hand