Kairi, the Swirling Sky, Protean Raider, Phyrexian Altar, Unearth, and Mirror Box

Prerequisites

• Kairi, the Swirling Sky on the battlefield
• Protean Raider on the battlefield
• Phyrexian Altar on the battlefield
• Unearth in the graveyard
• Mirror Box on the battlefield
• You have attacked this turn

Steps

1. Activate Phyrexian Altar by sacrificing Protean Raider, adding
2. When Protean Raider dies, it triggers, causing you to mill six cards and return Unearth and up to one other instant or sorcery card from your graveyard to your hand
3. Cast Unearth by paying , returning Protean Raider from your graveyard to the battlefield as a copy of Kairi
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite storm count
• Return all instant and sorcery cards from your graveyard to your hand