How can you create a combo with Polukranos Reborn // Polukranos, Engine of Ruin, Nim Deathmantle, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Polukranos Reborn // Polukranos, Engine of Ruin, Nim Deathmantle, Ashnod's Altar

Color identity: GW
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing another nontoken Hydra that does not have Nim Deathmantle attached, adding {C}{C}.
  2. When the Hydra dies, Polukranos and Nim Deathmantle trigger.
  3. Resolve the Polukranos trigger, creating two 3/3 Phyrexian Hydra creature tokens.
  4. Activate Ashnod's Altar by sacrificing a Phyrexian Hydra, adding {C}{C}.
  5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return the nontoken Hydra from your graveyard to the battlefield, and attach Nim Deathmantle to it.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite colorless mana[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least two additional nontoken Hydras.
  - Polukranos on the battlefield as Polukranos, Engine of Ruin.
[END OF COMBO PREREQUISITES]
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