Jinnie Fay, Jetmir's Second, Requiem Angel, and Ashnod's Altar

Prerequisites

• Jinnie Fay, Jetmir's Second on the battlefield
• Requiem Angel on the battlefield
• Ashnod's Altar on the battlefield
• You control another non-Spirit creature

Steps

1. Activate Ashnod's Altar by sacrificing any other non-Spirit you control, adding
2. The creature dies, triggering Requiem Angel, creating either a 2/2 Cat or a 3/1 Dog creature token
3. Repeat

Results

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