Boonweaver Giant, Phyrexian Altar, and Fool's Demise

Prerequisites

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

Steps

1. Activate Phyrexian 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 colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers