Boonweaver Giant, Phyrexian Altar, and Changing Loyalty

Prerequisites

• Boonweaver Giant on the battlefield
• Phyrexian Altar on the battlefield
• Changing Loyalty on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Boonweaver Giant When Boonweaver Giant dies, Changing Loyalty triggers, returning Boonweaver Giant from your graveyard to the battlefield When Boonweaver Giant enters, it triggers, returning Changing Loyalty from your graveyard to the battlefield attached to Boonweaver Giant
2. Repeat

Results

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