Grumgully, the Generous, Murderous Redcap, and Skirk Prospector

Prerequisites

• Grumgully, the Generous on the battlefield
• Murderous Redcap on the battlefield
• Skirk Prospector on the battlefield

Steps

1. Sacrifice Murderous Redcap to Skirk Prospector, adding and triggering Murderous Redcap's persist ability
2. Murderous redcap reenters with no counters due to Grumgully's +1/+1 counter cancelling the -1/-1 counter
3. Murderous Redcap deals two damage to any target
4. Repeat

Results

• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite red mana
• Infinite sacrifice triggers