Boonweaver Giant, Grimgrin, Corpse-Born, and Ferocity of the Hunt

Prerequisites

• Boonweaver Giant on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Ferocity of the Hunt on the battlefield

Steps

1. Activate Grimgrin by sacrificing Boonweaver Giant When Boonweaver Giant dies, Ferocity of the Hunt triggers, returning Boonweaver Giant from your graveyard to the battlefield When Boonweaver Giant enters, it triggers, returning Ferocity of the Hunt from your graveyard to the battlefield attached to Boonweaver Giant
2. Resolve the Grimgrin ability from step 1
3. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers