Elenda, the Dusk Rose, Nim Deathmantle, and Phyrexian Altar

Prerequisites

• Elenda, the Dusk Rose on the battlefield
• Nim Deathmantle on the battlefield
• Phyrexian Altar on the battlefield
• Nim Deathmantle attached to Elenda
• Elenda has at least one +1/+1 counter on it

Steps

1. Activate Phyrexian Altar by sacrificing Elenda, adding
2. Elenda dies, triggering itself and Nim Deathmantle
3. Resolve the Elenda trigger, creating at least four 1/1 Vampire creature tokens
4. Activate Phyrexian Altar by sacrificing three Vampire tokens, adding
5. Resolve the Nim Deathmantle trigger, paying to return Elenda to the battlefield, and attach Nim Deathmantle to it
6. Activate Phyrexian Altar by sacrificing a Vampire token, adding
7. Elenda triggers, putting a +1/+1 counter on itself
8. Activate Phyrexian Altar by sacrificing Elenda, adding
9. Elenda dies, triggering itself and Nim Deathmantle
10. Resolve the Elenda trigger, creating at least four 1/1 Vampire creature tokens
11. Activate Phyrexian Altar by sacrificing two Vampire tokens, adding
12. Repeat from step 5

Results

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