Elenda, the Dusk Rose, Antler Skulkin, Ashnod's Altar, and Elesh Norn, Grand Cenobite

Prerequisites

• Elenda, the Dusk Rose on the battlefield
• Antler Skulkin on the battlefield
• Ashnod's Altar on the battlefield
• Elesh Norn, Grand Cenobite on the battlefield
• Elenda does not have a -1/-1 counter on it
• available

Steps

1. Activate Antler Skulkin by paying , giving Elenda persist until end of turn
2. Activate Ashnod's Altar by sacrificing Elenda, adding
3. Elenda dies, triggering its second ability and its persist ability
4. Resolve Elenda's persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it
5. Resolve the second Elenda trigger, creating a number of 1/1 Vampire creature tokens equal to Elenda's power
6. Activate Ashnod's Altar by sacrificing a Vampire token, adding
7. The Vampire dies, triggering Elenda's first ability, putting a +1/+1 counter on it
8. Repeat

Results

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