Flayer of the Hatebound, Solemnity, and Phyrexian Altar

Prerequisites

• Flayer of the Hatebound on the battlefield
• Solemnity on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Flayer of the Hatebound, adding one mana of any color
2. Flayer of the Hatebound's undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to Solemnity
3. Flayer of the Hatebound enters the battlefield, dealing damage equal to its power to any target
4. Repeat

Results

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