How can you create a combo with Athreos, Shroud-Veiled, Denry Klin, Editor in Chief, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Athreos, Shroud-Veiled, Denry Klin, Editor in Chief, Phyrexian Altar

Color identity: WUB
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrifiing another nontoken creature with a coin counter on it, adding one mana of any color.
  2. When the creature dies, Athreos' third ability triggers, returning the creature from your graveyard to the battlefield.
  3. When the creature enters the battlefield, Denry Klin triggers, putting a coin counter on it.
  4. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Denry Klin and another nontoken creature you control each have a coin counter on them.
[END OF COMBO PREREQUISITES]
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