Requiem Angel, Conspiracy, and Phyrexian Altar

Prerequisites

• Requiem Angel on the battlefield
• Conspiracy on the battlefield
• Phyrexian Altar on the battlefield
• You control at least one additional creature
• Any creature type besides "Spirit" chosen with Conspiracy

Steps

1. Activate Phyrexian Altar by sacrificing any other creature you control, adding one mana of any color
2. The creature dies, triggering Requiem Angel, creating a 1/1 Spirit creature token
3. Repeat

Results

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