Boonweaver Giant, Ashnod's Altar, and Fool's Demise

Prerequisites

• Boonweaver Giant on the battlefield
• Ashnod's Altar on the battlefield
• Fool's Demise on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Boonweaver Giant When Boonweaver Giant dies, Fool's Demise's first and second ability triggers
2. Resolve the first trigger, returning Boonweaver Giant from your graveyard to the battlefield When Boonweaver Giant enters, it triggers, returning Fool's Demise from your graveyard to the battlefield attached to Boonweaver Giant
3. Resolve the second Fool's Demise ability, doing nothing,
4. Repeat

Results

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