Signpost Scarecrow + Training Grounds Combos

7 known combos featuring both cards in Commander

Infinite ETB Infinite LTB Infinite storm count Infinite draw triggers for any number of opponents Infinite card draw for any number of opponents

Combo 1 with Red Death, Shipwrecker + Pemmin's Aura

Results: Infinite draw triggers for any number of opponents · Infinite card draw for any number of opponents
Steps
  1. Activate Red Death by tapping it, adding {R}, goading a creature an opponent controls and causing that opponent to draw a card.
  2. Activate Signpost Scarecrow by paying {1}, adding {U}.
  3. Activate Pemmin's Aura by paying {U}, untapping Red Death.
  4. Repeat.

Combo 2 with Red Death, Shipwrecker + Freed from the Real

Results: Infinite draw triggers for any number of opponents · Infinite card draw for any number of opponents
Show steps
  1. Activate Red Death by tapping it, adding {R}, goading a creature an opponent controls and causing that opponent to draw a card.
  2. Activate Signpost Scarecrow by paying {1}, adding {U}.
  3. Activate Freed from the Real by paying {U}, untapping Red Death.
  4. Repeat.

Combo 3 with Knacksaw Clique + Grand Architect

Results: Cast any number of spells from opponents' libraries · Exile each opponent's library · Infinite colored mana · Infinite colorless mana that can only be spent to activate abilities of artifacts · Infinite colorless mana that can only be spent to cast artifact spells
Show steps
  1. Activate Grand Architect's second ability by tapping Knacksaw Clique, adding {C}{C} that can only be spent to cast artifact spells or to activate abilities of artifacts.
  2. Activate Signpost Scarecrow by paying {1}, adding {U}.
  3. Activate Knacksaw Clique by paying {U} and untapping it, exiling the top card of an opponents library and allowing you to cast it this turn.
  4. Repeat.

Combo 4 with Grinning Ignus + Cloud Key

Results: Infinite ETB · Infinite LTB · Infinite storm count
Show steps
  1. Activate Grinning Ignus by paying {R} and returning it to your hand, adding {C}{C}{R}.
  2. Cast Grinning Ignus by paying {1}{R}.
  3. Activate Signpost Scarecrow by paying {1}, adding {R}.
  4. Repeat.

Combo 5 with Grinning Ignus + Semblance Anvil

Results: Infinite colored mana · Infinite colorless mana · Infinite ETB · Infinite LTB · Infinite storm count
Show steps
  1. Pay {R} to return Grinning Ignus to your hand, adding {R}{C}{C}.
  2. Cast Grinning Ignus for {R}.
  3. Activate Signpost Scarecrow for {C} to add {R} leaving you where you started with with an additional {1}.
  4. Repeat for infinite mana.

Combo 6 with Grinning Ignus + Urza's Incubator

Results: Infinite ETB · Infinite LTB · Infinite storm count
Show steps
  1. Activate Grinning Ignus by paying {R} and returning it to your hand, adding {C}{C}{R}.
  2. Cast Grinning Ignus by paying {R}.
  3. Activate Signpost Scarecrow by paying {1}, adding {R}.
  4. Repeat.

Combo 7 with Grinning Ignus + Planar Gate

Results: Infinite ETB · Infinite LTB · Infinite storm count
Show steps
  1. Activate Grinning Ignus by paying {R} and returning it to your hand, adding {C}{C}{R}.
  2. Cast Grinning Ignus by paying {R}.
  3. Activate Signpost Scarecrow by paying {1}, adding {R}.
  4. Repeat.
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