Triskelavus, Cathars' Crusade, and Krark-Clan Ironworks

Prerequisites

• Triskelavus on the battlefield
• Cathars' Crusade on the battlefield
• Krark-Clan Ironworks on the battlefield
• available

Steps

1. Activate Triskelavus' first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Triskelvaite creature token
2. The Triskelvaite enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control
3. Activate Krark-Clan Ironworks by sacrificing the Triskelvaite, adding
4. Repeat

Results

• Infinite +1/+1 counters
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers