Arwen, Weaver of Hope, Slurrk, All-Ingesting, and Basking Broodscale

Prerequisites

• Arwen, Weaver of Hope on the battlefield
• Slurrk, All-Ingesting on the battlefield
• Basking Broodscale on the battlefield

Steps

1. Put a +1/+1 counter on Basking Broodscale
2. Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token that enters with a +1/+1 counter on it due to Arwen
3. Activate the Eldrazi Spawn by sacrificing it, adding
4. When the Eldrazi Spawn dies, Slurrk triggers, putting a +1/+1 counter on each creature you control that has a +1/+1 counter on it
5. Repeat from step 2

Results

• Infinite +1/+1 counters on certain creatures
• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite sacrifice triggers