Knight of Doves, Enchanted Evening, and Phyrexian Altar

Prerequisites

• Knight of Doves on the battlefield
• Enchanted Evening on the battlefield
• Phyrexian Altar on the battlefield
• You control at least one additional creature

Steps

1. Activate Phyrexian Altar by sacrificing another creature, adding one mana of any color
2. When the creature dies as an enchantment due to Enchanted Evening, Knight of Doves triggers, creating a 1/1 Bird creature token
3. Repeat

Results

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