Cast Retraction Helix by paying {U}, targeting a Bird, Rat, Otter and/or Frog you control that does not have summoning sickness.
Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
Resolve Retraction Helix.
Cast the noncreature permanent by paying {0}.
Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
Activate the creature targeted by Retraction Helix by tapping it, returning the noncreature permanent cast in step 4 from the battlefield to your hand.
Repeat from step 4.

Infinite storm count

Infinite untap of some creatures you control

Infinite power and toughness for certain creatures until end of turn

Noncreature permanent castable for {0}

Valley Floodcaller

Retraction Helix

Cast Banishing Knack by paying {U}, targeting a Bird, Rat, Otter and/or Frog you control that does not have summoning sickness.
Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
Resolve Banishing Knack.
Cast the noncreature permanent by paying {0}.
Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
Activate the creature targeted by Banishing Knack by tapping it, returning the noncreature permanent cast in step 4 from the battlefield to your hand.
Repeat from step 4.

Banishing Knack

Cast Retraction Helix by paying {U}, targeting a creature you control without summoning sickness.
Jeskai Ascendacy's first and second abilities trigger.
Resolve the first Jeskai Ascendancy trigger, giving creatures you control +1/+1 until end of turn and untapping them.
Resolve the second Jeskai Ascendancy trigger, allowing you to loot.
If the permanent that costs {0} can tap to add mana, activate it by tapping it, adding at least one mana.
Activate the creature by tapping it, returning the free permanent to your hand.
Cast that permanent by paying {0}.
Repeat from step 2.

Infinite looting

Infinite mana creatures you control can produce

Infinite mana the permanent cast infinite times can produce

Infinite untap of creatures you control

Infinitely large creatures you control until end of turn

Jeskai Ascendancy

Cast Retraction Helix by paying {U}, targeting any creature you control except Derevi that does not have summoning sickness.
Displacer Kitten triggers, blinking Derevi.
When Derevi enters the battlefield, it triggers, untapping the creature targeted in step 1.
Resolve Retraction Helix.
Cast the permanent from your hand by paying {0}.
Displacer Kitten triggers, blinking Derevi.
When Derevi enters the battlefield, it triggers, untapping the creature targeted by Retraction Helix.
Resolve the permanent spell.
Activate the creature targeted by Retraction Helix by tapping it, returning the permanent cast in step 5 from the battlefield to your hand.
Repeat from step 5.

Infinite creature LTB

Infinite creature ETB

Derevi, Empyrial Tactician

Displacer Kitten

Cast Banishing Knack by paying {U}, targeting any creature you control except Derevi that does not have summoning sickness.
Displacer Kitten triggers, blinking Derevi.
When Derevi enters the battlefield, it triggers, untapping the creature targeted in step 1.
Resolve Banishing Knack.
Cast the permanent from your hand by paying {0}.
Displacer Kitten triggers, blinking Derevi.
When Derevi enters the battlefield, it triggers, untapping the creature targeted by Banishing Knack.
Resolve the permanent spell.
Activate the creature targeted by Banishing Knack by tapping it, returning the permanent cast in step 5 from the battlefield to your hand.
Repeat from step 5.

Cast the noncreature permanent by paying {0}.
Activate The Tenth Doctor by paying at most {1}, removing three time counters from Reality Strobe.
Reality Strobe triggers, causing you to cast it from exile without paying its mana cost.
Storm-Kiln Artist triggers, creating a Treasure token.
Resolve Reality Strobe, returning Mana Vault from the battlefield to your hand, and then exiling Reality Strobe with three time counters on it.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Repeat.

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