Plaguemaw Beast, Thornbite Staff, and Herd Baloth

Prerequisites

• Plaguemaw Beast on the battlefield
• Thornbite Staff on the battlefield
• Herd Baloth on the battlefield
• Plaguemaw Beast does not have summoning sickness
• Herd Baloth has at least one +1/+1 counter on it
• You control at least one additional creature
• Thornbite Staff attached to Plaguemaw Beast

Steps

1. Activate Plaguemaw Beast by tapping it and sacrificing another creature
2. When the creature dies, Plaguemaw Beast triggers, untapping itself
3. Resolve the Plaguemaw Beast ability, putting a +1/+1 counter on Herd Baloth
4. Herd Baloth triggers, creating a 4/4 Beast creature token
5. Repeat

Results

• Infinite +1/+1 counters on Herd Baloth
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite proliferate
• Infinite sacrifice triggers