Mystic Speculation + Phyrexian Altar Combos

7 known combos featuring both cards in Commander

Infinite LTB Infinite ETB Infinite sacrifice triggers Infinite death triggers Infinite storm count

Combo 1 with Stormsplitter

Also requires: Stormsplitter Stormsplitter
Results: Infinite LTB · Infinite ETB · Infinite colored mana · Infinite sacrifice triggers · Infinite death triggers · Infinite storm count · Infinite creature tokens with haste · Infinite magecraft triggers · Infinite scry
Steps
  1. Csat Mystic Speculation with buyback by paying {2}{U}.
  2. Each Stormsplitter you control triggers, creating that many token copies of Stormsplitter.
  3. Resolve Mystic Speculation, causing you to scry 3 and return it to your hand.
  4. If you control at least 6 Stormsplitters, activate Phyrexian Altar three times by sacrificing three Stormsplitter tokens, adding {2}{U}.
  5. Repeat.

Combo 2 with Lord of the Nazgûl + Mindsplice Apparatus

Also requires: Lord of the Nazgûl Lord of the Nazgûl Mindsplice Apparatus Mindsplice Apparatus
Results: Infinite death triggers · Infinite ETB · Infinite LTB · Infinite magecraft triggers · Infinite sacrifice triggers · Infinite scry · Infinite storm count
Show steps
  1. Cast Mystic Speculation with buyback by paying {U}.
  2. Lord of the Nazgûl triggers, creating a 3/3 Wraith creature token.
  3. Resolve Mystic Speculation, causing you to scry 3 and return Mystic Speculation to your hand.
  4. Activate Phyrexian Altar by sacrificing the Wraith, adding {U}.
  5. Repeat.

Combo 3 with Will, Scion of Peace + Deekah, Fractal Theorist

Results: Infinite death triggers · Infinite ETB · Infinite LTB · Infinite magecraft triggers · Infinite sacrifice triggers · Infinite scry · Infinite storm count
Show steps
  1. Activate Will by tapping it, reducing the cost of all white and/or blue spells you cast this turn by at least {2}.
  2. Cast Mystic Speculation with buyback by paying {U} due to Will's ability.
  3. Deekah triggers, creating a 0/0 Fractal creature token, and then putting a +1/+1 counter on the Fractal.
  4. Resolve Mystic Speculation, causing you to scry 3 and return it to your hand.
  5. Activate Phyrexian Altar by sacrificing the Fractal, adding {U}.
  6. Repeat from step 2.

Combo 4 with Poppet Stitcher // Poppet Factory + Mana Echoes

Results: Infinite colorless mana · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite magecraft triggers · Infinite sacrifice triggers · Infinite scry · Infinite storm count
Show steps
  1. Cast Mystic Speculation with buyback by paying {2}{U}.
  2. Poppet Stitcher triggers, creating a 2/2 Zombie creature token.
  3. When the Zombie enters the battlefield, Mana Echoes triggers, adding {C} for each Zombie you control.
  4. Resolve Mystic Speculation, causing you to scry 3 and returning Mystic Speculation to your hand.
  5. Activate Phyrexian Altar by sacrificing the Zombie, adding {U}.
  6. Repeat.
  7. If you control two or more Zombies as the combo begins, this combo nets infinite colorless mana.

Combo 5 with The Locust God + Eligeth, Crossroads Augur

Results: Infinite card draw · Infinite draw triggers · Near-infinite death triggers · Near-infinite ETB · Near-infinite LTB · Near-infinite magecraft triggers · Near-infinite sacrifice triggers · Near-infinite storm count
Show steps
  1. Cast Mystic Speculation with buyback by paying {2}{U}, causing you to draw three cards due to Eligeth and return Mystic Speculation to your hand.
  2. The Locust God triggers three times, creating three 1/1 Insect creature tokens with flying and haste.
  3. Activate Phyrexian Altar three times by sacrificing the three Insects, adding {2}{U}.
  4. Repeat.

Combo 6 with Minn, Wily Illusionist + Manaform Hellkite + Grinning Ignus

Results: Infinite death triggers · Infinite ETB · Infinite LTB · Infinite magecraft triggers · Infinite sacrifice triggers · Infinite scry · Infinite storm count
Show steps
  1. Cast Mystic Speculation with buyback by paying {2}{U}.
  2. Manaform Hellkite triggers, creating a 3/3 Dragon Illusion token.
  3. Resolve Mystic Speculation, scrying 3 and returning Mystic Speculation to your hand.
  4. Activate Phyrexian Altar by sacrificing the Dragon Illusion, adding {U}.
  5. The Dragon Illusion dies, triggering Minn's second ability, putting Grinning Ignus from your hand onto the battlefield.
  6. Activate Grinning Ignus by paying {R} and returning it from the battlefield to your hand, adding {C}{C}{R}.
  7. Repeat.

Combo 7 with Will, Scion of Peace + Sedgemoor Witch

Results: Infinite death triggers · Infinite ETB · Infinite lifegain · Infinite lifegain triggers · Infinite LTB · Infinite magecraft triggers · Infinite sacrifice triggers · Infinite scry · Infinite storm count
Show steps
  1. Activate Will by tapping it, reducing the cost of all white and/or blue spells you cast this turn by at least {2}.
  2. Cast Mystic Speculation with buyback by paying {U} due to Will's ability.
  3. Sedgemoor Witch triggers, creating a 1/1 Pest creature token.
  4. Resolve Mystic Speculation, causing you to scry 3 and return it to your hand.
  5. Activate Phyrexian Altar by sacrificing the Pest, adding {U}.
  6. When the Pest dies, it triggers, causing you to gain 1 life.
  7. Repeat from step 2.
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