Turtle Power!

a Turtle it boosts — 154 cards in the game can cause this (Turtle Power! is one).

1. Slash, Reptile Rampager — Turtle Power! gives Slash, Reptile Rampager bigger stats
2. Bloodline Pretender — Turtle Power! gives Bloodline Pretender bigger stats
3. Gladewalker Ritualist — Turtle Power! gives Gladewalker Ritualist bigger stats
4. Lita, Little Orphan Amphibian — Turtle Power! gives Lita, Little Orphan Amphibian bigger stats
5. Raphael, Tough Turtle — Turtle Power! gives Raphael, Tough Turtle bigger stats
6. Fecund Greenshell — Turtle Power! gives Fecund Greenshell bigger stats
7. Raphael, Most Attitude — Turtle Power! gives Raphael, Most Attitude bigger stats
8. The Pride of Hull Clade — Turtle Power! gives The Pride of Hull Clade bigger stats
9. Venus, Torn Between Worlds — Turtle Power! gives Venus, Torn Between Worlds bigger stats
10. Barkform Harvester — Turtle Power! gives Barkform Harvester bigger stats

144 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 (Turtle Power! is one).

When Turtle Power! 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 (Turtle Power! is one).

1. Historian's Boon — When Turtle Power! enters, Historian's Boon makes a token

an enchantment enters the battlefield — 3,743 cards in the game can cause this (Turtle Power! is one).

When Turtle Power! enters:

1. Calix, Guided by Fate — puts a counter on a creature
2. Elvish Archivist — draws you 1 card
3. Victor, Valgavoth's Seneschal — surveils
4. Strength from the Fallen — gives +X/+X, where X is the number of creature cards in your graveyard
5. Doomwake Giant — shrinks a creature by -1/-1
6. Cacophony Unleashed — turns something into a creature
7. Ghostly Dancers — makes a token
8. Thassa's Devourer — mills a card
9. Killian, Decisive Mentor — taps a creature
10. Thoughtrender Lamia — makes an opponent discard a card

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