Sparring Regimen

a creature untaps — 519 cards in the game can cause this (Sparring Regimen is one).

1. Fishing Pole — When a creature untaps thanks to Sparring Regimen, Fishing Pole triggers

a creature gets a counter — 2,691 cards in the game can cause this (Sparring Regimen is one).

When a creature gets a counter thanks to Sparring Regimen:

1. Hollowmurk Siege — draws you 1 card
2. Ant-Man, Colony Commander — makes a token
3. Earth Kingdom General — gains you that much life
4. Casey Jones, Back Alley Brute — deals that much damage
5. Shalai and Hallar — deals that much damage
6. Danny Pink — draws you 1 card
7. Enduring Scalelord — puts a +1/+1 counter on itself
8. Mikey & Leo, Chaos & Order — draws you 1 card
9. Knight of Wundagore — puts a +1/+1 counter on itself
10. Omarthis, Ghostfire Initiate — puts a counter on a permanent

31 other cards care about it too. These are the ones with the most connections.

an enchantment is cast — 3,673 cards in the game can cause this (Sparring Regimen is one).

When Sparring Regimen is cast:

1. Hallowed Haunting — makes a token
2. Daxos the Returned — puts a counter on a permanent
3. Tatsunari, Toad Rider — makes a token
4. Sythis, Harvest's Hand — gains you 1 life
5. Sigil of the Empty Throne — makes a token
6. Dawnhart Geist — gains you 2 life
7. Herald of the Pantheon — gains you 1 life
8. Kami of Transience — puts a +1/+1 counter on itself
9. Argothian Enchantress — draws you 1 card
10. Mesa Enchantress — draws you 1 card

255 other cards care about it too. These are the ones with the most connections.

a nontoken enchantment enters the battlefield — 3,691 cards in the game can cause this (Sparring Regimen is one).

1. Historian's Boon — When Sparring Regimen enters, Historian's Boon makes a token

an enchantment enters the battlefield — 3,743 cards in the game can cause this.

When Sparring Regimen:

1. Calix, Guided by Fate — enters, Calix, Guided by Fate puts a counter on a creature
2. Elvish Archivist — enters, Elvish Archivist draws you 1 card
3. Victor, Valgavoth's Seneschal — enters, Victor, Valgavoth's Seneschal surveils
4. Strength from the Fallen — enters, Strength from the Fallen gives +X/+X, where X is the number of creature cards in your graveyard
5. Doomwake Giant — enters, Doomwake Giant shrinks a creature by -1/-1
6. Cacophony Unleashed — enters, Cacophony Unleashed turns something into a creature
7. Ghostly Dancers — enters, Ghostly Dancers makes a token
8. Thassa's Devourer — enters, Thassa's Devourer mills a card
9. Emeria Shepherd — enters thanks to Emeria Shepherd, it triggers
10. Bilbo, Unexpected Adventurer — enters thanks to Bilbo, Unexpected Adventurer, it triggers
11. Astelli Reclaimer — enters thanks to Astelli Reclaimer, it triggers
12. Harnessed Snubhorn — enters thanks to Harnessed Snubhorn, it triggers
13. Eiganjo Dynastorian // Replenish — enters thanks to Eiganjo Dynastorian // Replenish, it triggers
14. Archon of Falling Stars — enters thanks to Archon of Falling Stars, it triggers
15. Silent Sentinel — enters thanks to Silent Sentinel, it triggers
16. Unyielding Gatekeeper — enters thanks to Unyielding Gatekeeper, it triggers
17. Ao, the Dawn Sky — enters thanks to Ao, the Dawn Sky, it triggers
18. Wilfred Mott — enters thanks to Wilfred Mott, it triggers
19. Killian, Decisive Mentor — enters, Killian, Decisive Mentor taps a creature
20. Thoughtrender Lamia — enters, Thoughtrender Lamia makes an opponent discard a card

63 other cards care about it too. These are the ones with the most connections.

anything gets a counter — 4,415 cards in the game can cause this (Sparring Regimen is one).

1. All Will Be One — When a creature gets a counter thanks to Sparring Regimen, All Will Be One deals that much damage

7 other cards care about it too. These are the ones with the most connections.

anything attacks — 17,934 cards in the game can cause this.

1. Daxos, Blessed by the Sun — When Daxos, Blessed by the Sun attacks, Sparring Regimen puts a counter on a creature
2. Enduring Innocence — When Enduring Innocence attacks, Sparring Regimen puts a counter on a creature
3. Glory Bearers — When Glory Bearers attacks, Sparring Regimen puts a counter on a creature
4. Lionheart Glimmer — When Lionheart Glimmer attacks, Sparring Regimen puts a counter on a creature
5. Ojutai Exemplars — When Ojutai Exemplars attacks, Sparring Regimen puts a counter on a creature
6. Sun-Blessed Healer — When Sun-Blessed Healer attacks, Sparring Regimen puts a counter on a creature
7. Psemilla, Meletian Poet — When Psemilla, Meletian Poet attacks, Sparring Regimen puts a counter on a creature
8. Eidolon of Astral Winds — When Eidolon of Astral Winds attacks, Sparring Regimen puts a counter on a creature
9. Harvestguard Alseids — When Harvestguard Alseids attacks, Sparring Regimen puts a counter on a creature
10. Dawn Evangel — When Dawn Evangel attacks, Sparring Regimen puts a counter on a creature

17,924 other cards cause it too. These are the ones with the most connections.