Chromatic Orrery + Priest of Urabrask Combos

3 known combos featuring both cards in Commander

Infinite ETB Infinite colored mana Infinite creature tokens with haste Infinite LTB Infinite sacrifice triggers

Combo 1 with Chthonian Nightmare + Greedy Freebooter

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite scry 1 · Infinite storm count · Infinite energy counters
Steps
  1. Activate Chthonian Nightmare by paying {E}{E}{E}, sacrificing Greedy Freebooter and returning Chthonian Nightmare from the battlefield to your hand.
  2. When Greedy Freebooter dies, it triggers, creating a Treasure token and causing you to scry 1.
  3. Resolve the Chthonian Nightmare ability, returning Priest of Urabrask from your graveyard to the battlefield.
  4. When Priest of Urabrask enters the battlefield, it triggers, adding {R}{R}{R}.
  5. Activate the Treasure by tapping and sacrificing it, adding {B}.
  6. Cast Chthonian Nightmare by paying {1}{B}.
  7. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
  8. Activate Chthonian Nightmare by paying {E}, sacrificing Priest of Urabrask and returning Chthonian Nightmare from the battlefield to your hand, returning Greedy Freebooter from your graveyard to the battlefield.
  9. Cast Chthonian Nightmare by paying {1}{R}, enabled by Chromatic Orrery.
  10. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
  11. Repeat.

Combo 2 with Kiki-Jiki, Mirror Breaker + Pemmin's Aura

Results: Infinite colored mana · Infinite creature tokens with haste · Infinite ETB
Show steps
  1. Activate Kiki-Jiki by tapping it, creating a token copy of Priest of Urabrask with haste.
  2. When the Priest of Urabrask token enters the battlefield, it triggers, adding {3}.
  3. Activate Pemmin's Aura's first ability by paying {1}, untapping Kiki-Jiki.
  4. Repeat.

Combo 3 with Kiki-Jiki, Mirror Breaker + Freed from the Real

Results: Infinite colored mana · Infinite creature tokens with haste · Infinite ETB
Show steps
  1. Activate Kiki-Jiki by tapping it, creating a token copy of Priest of Urabrask with haste.
  2. When the Priest of Urabrask token enters the battlefield, it triggers, adding {3}.
  3. Activate Freed from the Real's second ability by paying {1}, untapping Kiki-Jiki.
  4. Repeat.
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