Cass, Hand of Vengeance + Griffin Guide + Ashnod's Altar

Prerequisites

• Griffin Guide attached to another creature you control.
• You control an additional creature beyond those included above and the one that has Griffin Guide attached.

Steps

1. 1Activate Ashnod's Altar by sacrificing the creature with Griffin Guide attached.
2. 2When the creature dies, Cass and Griffin Guide trigger.
3. 3Resolve the Griffin Guide trigger, creating a 2/2 Griffin creature token.
4. 4Resolve the Cass trigger, returning Griffin Guide from your graveyard to the battlefield attached to another creature you control.
5. 5Repeat.

Effects

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