Boonweaver Giant, Yahenni, Undying Partisan, and Kaya's Ghostform

Prerequisites

• Boonweaver Giant on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Kaya's Ghostform on the battlefield

Steps

1. Activate Yahenni by sacrificing Boonweaver Giant When Boonweaver Giant dies, Kaya's Ghostform triggers, returning Boonweaver Giant from your graveyard to the battlefield When Boonweaver Giant enters, it triggers, returning Kaya's Ghostform from your graveyard to the battlefield attached to Boonweaver Giant
2. Resolve the Yahenni ability from step 1
3. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite death triggers