Denry Klin, Editor in Chief, Glen Elendra Archmage, and Ashnod's Altar

Prerequisites

• Denry Klin, Editor in Chief on the battlefield
• Glen Elendra Archmage on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Glen Elendra Archmage, adding
2. Glen Elendra Archmage dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Glen Elendra Archmage enters the battlefield, triggering Denry Klin, putting a +1/+1 counter on Glen Elendra Archmage
4. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers