Riddleform

cast a battle — 100 cards in the game can cause this.

1. Madame Web, Clairvoyant — When a Spider is cast thanks to Madame Web, Clairvoyant, Riddleform turns something into a creature
2. The Key to the Vault — When The Key to the Vault is cast, Riddleform turns something into a creature
3. Jace, Architect of Thought — When Jace, Architect of Thought is cast, Riddleform turns something into a creature
4. Reenact the Crime — When Reenact the Crime is cast, Riddleform turns something into a creature
5. Treasure Keeper — When an artifact is cast thanks to Treasure Keeper, Riddleform turns something into a creature
6. Vision, Spectral Synthezoid — When a Robot is cast thanks to Vision, Spectral Synthezoid, Riddleform turns something into a creature
7. Haldan, Avid Arcanist — When an artifact is cast thanks to Haldan, Avid Arcanist, Riddleform turns something into a creature
8. Yue, the Moon Spirit — When an artifact is cast thanks to Yue, the Moon Spirit, Riddleform turns something into a creature
9. Wondrous Crucible — When Wondrous Crucible is cast, Riddleform turns something into a creature
10. Ugin, Eye of the Storms — When Ugin, Eye of the Storms is cast, Riddleform turns something into a creature

90 other cards cause it too. These are the ones with the most connections.

cast a planeswalker — 361 cards in the game can cause this.

1. The Aetherspark — When The Aetherspark is cast, Riddleform turns something into a creature

360 other cards cause it too. These are the ones with the most connections.

you scry — 420 cards in the game can cause this (Riddleform is one).

When Riddleform scries:

1. Prudent Fateseer // Peer Review — gives +1/+0
2. Diviner of Victory // Unwind History — gets +1/+1
3. Saheeli, Consul of Oversight — makes a token
4. Celeborn the Wise — makes your creatures bigger
5. Proft, Consulting Detective — puts a +1/+1 counter on itself
6. Matoya, Archon Elder — draws you 1 card
7. Denzilore Fatehold — puts a counter on a creature
8. Elminster — costs less
9. Elrond, Master of Healing — puts a counter on a creature
10. Galadriel of Lothlórien — puts a land onto the battlefield

10 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.

1. Hallowed Haunting — When Riddleform is cast, Hallowed Haunting makes a token
2. Daxos the Returned — When Riddleform is cast, Daxos the Returned puts a counter on a permanent
3. Tatsunari, Toad Rider — When Riddleform is cast, Tatsunari, Toad Rider makes a token
4. Sythis, Harvest's Hand — When Riddleform is cast, Sythis, Harvest's Hand gains you 1 life
5. Sigil of the Empty Throne — When Riddleform is cast, Sigil of the Empty Throne makes a token
6. Dawnhart Geist — When Riddleform is cast, Dawnhart Geist gains you 2 life
7. Herald of the Pantheon — When Riddleform is cast, Herald of the Pantheon gains you 1 life
8. Kami of Transience — When Riddleform is cast, Kami of Transience puts a +1/+1 counter on itself
9. Argothian Enchantress — When Riddleform is cast, Argothian Enchantress draws you 1 card
10. Mesa Enchantress — When Riddleform is cast, Mesa Enchantress draws you 1 card
11. Virtue of Knowledge // Vantress Visions — When Virtue of Knowledge // Vantress Visions is cast, Riddleform turns something into a creature
12. Bident of Thassa — When Bident of Thassa is cast, Riddleform turns something into a creature
13. Eye of the Storm — When an instant is cast thanks to Eye of the Storm, Riddleform turns something into a creature
14. Spellweaver Volute — When an instant is cast thanks to Spellweaver Volute, Riddleform turns something into a creature
15. Precognition Field — When an instant is cast thanks to Precognition Field, Riddleform turns something into a creature

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

cast an artifact — 3,683 cards in the game can cause this.

1. Sword of Once and Future — When an instant is cast thanks to Sword of Once and Future, Riddleform turns something into a creature
2. Glamdring — When an instant is cast thanks to Glamdring, Riddleform turns something into a creature
3. Spellbinder — When an instant is cast thanks to Spellbinder, Riddleform turns something into a creature
4. Bilbo, Thief in the Night — When an artifact is cast thanks to Bilbo, Thief in the Night, Riddleform turns something into a creature
5. Victor Timely, Wily Tycoon — When an artifact is cast thanks to Victor Timely, Wily Tycoon, Riddleform turns something into a creature
6. Scholar of the Lost Trove — When an artifact is cast thanks to Scholar of the Lost Trove, Riddleform turns something into a creature
7. Torrential Gearhulk — When an instant is cast thanks to Torrential Gearhulk, Riddleform turns something into a creature
8. Skyway Robber — When an artifact is cast thanks to Skyway Robber, Riddleform turns something into a creature
9. Glamdring, Foe-hammer // Gleam of Death — When Glamdring, Foe-hammer // Gleam of Death is cast, Riddleform turns something into a creature
10. Blue Mage's Cane — When Blue Mage's Cane is cast, Riddleform turns something into a creature

3,673 other cards cause 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 (Riddleform is one).

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

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

When Riddleform 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

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

anything enters the battlefield — 26,499 cards in the game can cause this (Riddleform is one).

1. Nature's Wrath — When Riddleform enters, Nature's Wrath makes a player sacrifice an Island or permanent

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