Necrosynthesis, Scurry Oak, Krark-Clan Ironworks, and Encroaching Mycosynth

Prerequisites

• Necrosynthesis on the battlefield
• Scurry Oak on the battlefield
• Krark-Clan Ironworks on the battlefield
• Encroaching Mycosynth on the battlefield
• Necrosynthesis attached to Scurry Oak
• You control an additional creature

Steps

1. Activate Krark-Clan Ironworks by sacrificing a creature, adding
2. Necrosynthesis triggers, putting a +1/+1 counter on Scurry Oak
3. Scurry Oak triggers, creating a 1/1 Squirrel creature token
4. Activate Krark-Clan Ironworks by sacrificing the Squirrel token, adding
5. Repeat from step 2

Results

• Infinite +1/+1 counters on Scurry Oak
• Infinite colored mana
• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers