Grim Monolith + Retraction Helix Combos

1 known combo featuring both cards in Commander

Infinite storm count Infinite untap of some creatures you control Infinite power and toughness for certain creatures until end of turn Infinite colorless mana

Combo 1 with Valley Floodcaller

Also requires: Valley Floodcaller Valley Floodcaller
Results: Infinite storm count · Infinite untap of some creatures you control · Infinite power and toughness for certain creatures until end of turn · Infinite colorless mana
Steps
  1. Cast Retraction Helix by paying {U}, targeting a Bird, Rat, Otter and/or Frog you control that does not have summoning sickness.
  2. Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
  3. Resolve Retraction Helix.
  4. Cast Grim Monolith by paying its mana cost.
  5. Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
  6. Activate Grim Monolith by tapping it, adding {C}{C}{C}.
  7. Activate the creature targeted by Retraction Helix by tapping it, returning Grim Monolith from the battlefield to your hand.
  8. Repeat from step 4.
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