Basking Broodscale, Archangel of Thune, and Ajani's Welcome

Prerequisites

• Basking Broodscale on the battlefield
• Archangel of Thune on the battlefield
• Ajani's Welcome on the battlefield
• You have a way to put a +1/+1 counter on Basking Broodscale

Steps

1. Put a +1/+1 counter on Basking Broodscale
2. Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token
3. When the Eldrazi Spawn enters the battlefield, Ajani's Welcome triggers, causing you to gain 1 life
4. Archangel of Thune triggers, putting a +1/+1 counter on each creature you control
5. Repeat from step 2

Results

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