Phyrexian Altar, Icewind Stalwart, and Sister Hospitaller

Prerequisites

• Phyrexian Altar on the battlefield
• Icewind Stalwart in hand
• Sister Hospitaller on the battlefield
• available

Steps

1. Cast Icewind Stalwart by paying its mana cost
2. When Icewind Stalwart enters the battlefield, it triggers, targeting Sister Hospitaller Holding priority, activate Phyrexian Altar by sacrificing Icewind Stalwart
3. Resolve the Icewind Stalwart ability, blinking Sister Hospitaller When Sister Hospitaller enters, it triggers, returning Icewind Stalwart from your graveyard to the battlefield
4. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain