41 cards where the text includes “whenever” and the text includes “untap” and the text includes “cast”

Akroan Conscriptor {4}{R}

Creature — Human Shaman

Heroic — Whenever you cast a spell that targets Akroan Conscriptor, gain control of another target creature until end of turn. Untap that creature. It gains haste until end of turn.

3/2
Ballynock Trapper {3}{W}

Creature — Kithkin Soldier

{T}: Tap target creature.

Whenever you cast a white spell, you may untap Ballynock Trapper.

2/2
Blistercoil Weird {U/R}

Creature — Weird

Whenever you cast an instant or sorcery spell, Blistercoil Weird gets +1/+1 until end of turn. Untap it.

1/1
Chakram Retriever {4}{U}

Creature — Elemental Hound

Partner with Chakram Slinger (When this creature enters the battlefield, target player may put Chakram Slinger into their hand from their library, then shuffle.)

Whenever you cast a spell during your turn, untap target creature.

2/4
Chandra, Fire of Kaladesh {1}{R}{R}

Legendary Creature — Human Shaman

Whenever you cast a red spell, untap Chandra, Fire of Kaladesh.

{T}: Chandra, Fire of Kaladesh deals 1 damage to target player or planeswalker. If Chandra has dealt 3 or more damage this turn, exile her, then return her to the battlefield transformed under her owner’s control.

2/2
Chandra, Roaring Flame

Legendary Planeswalker — Chandra

+1: Chandra, Roaring Flame deals 2 damage to target player or planeswalker.

−2: Chandra, Roaring Flame deals 2 damage to target creature.

−7: Chandra, Roaring Flame deals 6 damage to each opponent. Each player dealt damage this way gets an emblem with “At the beginning of your upkeep, this emblem deals 3 damage to you.”

Loyalty: 4
Cinder Pyromancer {2}{R}

Creature — Elemental Shaman

{T}: Cinder Pyromancer deals 1 damage to target player or planeswalker.

Whenever you cast a red spell, you may untap Cinder Pyromancer.

0/1
Dwarven Patrol {2}{R}

Creature — Dwarf

Dwarven Patrol doesn’t untap during your untap step.

Whenever you cast a nonred spell, untap Dwarven Patrol.

4/2
Flash Conscription {5}{R}

Instant

Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn. If {W} was spent to cast this spell, the creature gains “Whenever this creature deals combat damage, you gain that much life” until end of turn.

Gelectrode {1}{U}{R}

Creature — Weird

{T}: Gelectrode deals 1 damage to any target.

Whenever you cast an instant or sorcery spell, you may untap Gelectrode.

0/1
Gilt-Leaf Archdruid {3}{G}{G}

Creature — Elf Druid

Whenever you cast a Druid spell, you may draw a card.

Tap seven untapped Druids you control: Gain control of all lands target player controls.

3/3
Hematite Talisman {2}

Artifact

Whenever a player casts a red spell, you may pay {3}. If you do, untap target permanent.

Innocence Kami {3}{W}{W}

Creature — Spirit

{W}, {T}: Tap target creature.

Whenever you cast a Spirit or Arcane spell, untap Innocence Kami.

2/3
Inspired Sprite {3}{U}

Creature — Faerie Wizard

Flash

Flying

Whenever you cast a Wizard spell, you may untap Inspired Sprite.

{T}: Draw a card, then discard a card.

2/2
Jeskai Ascendancy {U}{R}{W}

Enchantment

Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn. Untap those creatures.

Whenever you cast a noncreature spell, you may draw a card. If you do, discard a card.

Kefnet's Monument {3}

Legendary Artifact

Blue creature spells you cast cost {1} less to cast.

Whenever you cast a creature spell, target creature an opponent controls doesn’t untap during its controller’s next untap step.

Lapis Lazuli Talisman {2}

Artifact

Whenever a player casts a blue spell, you may pay {3}. If you do, untap target permanent.

Leonin Battlemage {3}{W}

Creature — Cat Wizard

{T}: Target creature gets +1/+1 until end of turn.

Whenever you cast a spell, you may untap Leonin Battlemage.

2/3
Lightning-Rig Crew {2}{R}

Creature — Goblin Pirate

{T}: Lightning-Rig Crew deals 1 damage to each opponent.

Whenever you cast a Pirate spell, untap Lightning-Rig Crew.

0/5
Lobber Crew {2}{R}

Creature — Goblin Warrior

Defender

{T}: Lobber Crew deals 1 damage to each opponent.

Whenever you cast a multicolored spell, untap Lobber Crew.

0/4
Malachite Talisman {2}

Artifact

Whenever a player casts a green spell, you may pay {3}. If you do, untap target permanent.

Melee {4}{R}

Instant

Cast this spell only during your turn and only during combat before blockers are declared.

You choose which creatures block this combat and how those creatures block.

Whenever a creature attacks and isn’t blocked this combat, untap it and remove it from combat.

Merrow Bonegnawer {B}

Creature — Merfolk Rogue

{T}: Target player exiles a card from their graveyard.

Whenever you cast a black spell, you may untap Merrow Bonegnawer.

1/1
Merrow Levitator {3}{U}

Creature — Merfolk Wizard

{T}: Target creature gains flying until end of turn.

Whenever you cast a blue spell, you may untap Merrow Levitator.

2/3
Merrow Reejerey {2}{U}

Creature — Merfolk Soldier

Other Merfolk creatures you control get +1/+1.

Whenever you cast a Merfolk spell, you may tap or untap target permanent.

2/2
Mirran Spy {2}{U}

Creature — Drone

Flying

Whenever you cast an artifact spell, you may untap target creature.

1/3
Nacre Talisman {2}

Artifact

Whenever a player casts a white spell, you may pay {3}. If you do, untap target permanent.

Nettle Drone {2}{R}

Creature — Eldrazi Drone

Devoid (This card has no color.)

{T}: Nettle Drone deals 1 damage to each opponent.

Whenever you cast a colorless spell, untap Nettle Drone.

3/1
Nettle Sentinel {G}

Creature — Elf Warrior

Nettle Sentinel doesn’t untap during your untap step.

Whenever you cast a green spell, you may untap Nettle Sentinel.

2/2
Niblis of Frost {2}{U}{U}

Creature — Spirit

Flying

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever you cast an instant or sorcery spell, tap target creature an opponent controls. That creature doesn’t untap during its controller’s next untap step.

3/3
Onyx Talisman {2}

Artifact

Whenever a player casts a black spell, you may pay {3}. If you do, untap target permanent.

Paradox Engine {5}

Legendary Artifact

Whenever you cast a spell, untap all nonland permanents you control.

Pristine Angel {4}{W}{W}

Creature — Angel

Flying

As long as Pristine Angel is untapped, it has protection from artifacts and from all colors.

Whenever you cast a spell, you may untap Pristine Angel.

4/4
Pristine Skywise {4}{W}{U}

Creature — Dragon

Flying

Whenever you cast a noncreature spell, untap Pristine Skywise. It gains protection from the color of your choice until end of turn.

6/4
Quiet Contemplation {2}{U}

Enchantment

Whenever you cast a noncreature spell, you may pay {1}. If you do, tap target creature an opponent controls and it doesn’t untap during its controller’s next untap step.

Stinging Lionfish {1}{U}

Enchantment Creature — Fish

Whenever you cast your first spell during each opponent’s turn, you may tap or untap target nonland permanent.

2/1
Tamiyo, Field Researcher {1}{G}{W}{U}

Legendary Planeswalker — Tamiyo

+1: Choose up to two target creatures. Until your next turn, whenever either of those creatures deals combat damage, you draw a card.

−2: Tap up to two target nonland permanents. They don’t untap during their controller’s next untap step.

−7: Draw three cards. You get an emblem with “You may cast spells from your hand without paying their mana costs.”

Loyalty: 4
Teller of Tales {3}{U}{U}

Creature — Spirit

Flying

Whenever you cast a Spirit or Arcane spell, you may tap or untap target creature.

3/3
Thermo-Alchemist {1}{R}

Creature — Human Shaman

Defender

{T}: Thermo-Alchemist deals 1 damage to each opponent.

Whenever you cast an instant or sorcery spell, untap Thermo-Alchemist.

0/3
Traxos, Scourge of Kroog {4}

Legendary Artifact Creature — Construct

Trample

Traxos, Scourge of Kroog enters the battlefield tapped and doesn’t untap during your untap step.

Whenever you cast a historic spell, untap Traxos. (Artifacts, legendaries, and Sagas are historic.)

7/7
Wavecrash Triton {2}{U}

Creature — Merfolk Wizard

Heroic — Whenever you cast a spell that targets Wavecrash Triton, tap target creature an opponent controls. That creature doesn’t untap during its controller’s next untap step.

1/4
Zephyr Scribe {2}{U}

Creature — Human Monk

{U}, {T}: Draw a card, then discard a card.

Whenever you cast a noncreature spell, untap Zephyr Scribe.

2/1

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.