Krenko, Mob Boss, Umbral Mantle, and Skirk Prospector

Prerequisites

• Krenko, Mob Boss on the battlefield
• Umbral Mantle on the battlefield
• Skirk Prospector on the battlefield
• You control at least two additional Goblins
• Krenko does not have summoning sickness
• Umbral Mantle attached to Krenko

Steps

1. Activate Krenko using its own ability by tapping it, creating at least four 1/1 Goblin creature tokens
2. Activate Skirk Prospector three times by sacrificing three Goblin tokens, adding
3. Activate Krenko using its ability from Umbral Mantle by paying and untapping it, giving itself +2/+2 until end of turn
4. Repeat any number of times
5. Once you have infinite Goblin tokens, you may activate Skirk Prospector any number of times

Results

• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely large Krenko, Mob Boss until end of turn
• Infinite red mana
• Infinite sacrifice triggers