Darien, King of Kjeldor, Havoc Jester, Ashnod's Altar, and Syr Vondam, Sunstar Exemplar

Prerequisites

• Darien, King of Kjeldor on the battlefield
• Havoc Jester on the battlefield
• Ashnod's Altar on the battlefield
• Syr Vondam, Sunstar Exemplar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing a creature, adding When the creature dies, Syr Vondam and Havoc Jester trigger
2. Resolve the Syr Vondam trigger, causing you to gain 1 life and put a +1/+1 counter on Syr Vondam Resolve the Havoc Jester trigger, dealing 1 damage to you
3. Darien triggers, creating a 1/1 Soldier creature token
4. Repeat

Results

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