How can you create a combo with Dual Nature, Rot Hulk, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Dual Nature, Rot Hulk, Phyrexian Altar

Color identity: BG
Mana cost: {5}{B}{B}
Steps:
  1. Cast Rot Hulk by paying {5}{B}{B}.
  2. Rot Hulk enters the battlefield, triggering itself and Dual Nature.
  3. Holding priority, activate Phyrexian Altar by sacrificing Rot Hulk, adding one mana of any color.
  4. Dual Nature's second ability triggers, exiling all tokens named Rot Hulk.
  5. Resolve the Rot Hulk trigger from step 2, failing to return anything to the battlefield.
  6. Resolve the Dual Nature trigger from step 2, creating a token copy of Rot Hulk.
  7. The token copy of Rot Hulk enters the battlefield, returning Rot Hulk from your graveyard to the battlefield.
  8. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Return all Zombies from your graveyard to the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Dual Nature must be on the battlefield
  - Rot Hulk must be in your hand
  - Phyrexian Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
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