Tempered Steel

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

When Tempered Steel 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 (Tempered Steel is one).

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

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

When Tempered Steel 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

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

an artifact it boosts — 4,531 cards in the game can cause this (Tempered Steel is one).

Tempered Steel gives:

1. ED-E, Lonesome Eyebot — bigger stats
2. Fire Navy Trebuchet — bigger stats
3. Dyadrine, Synthesis Amalgam — bigger stats
4. Locutus of Borg — bigger stats
5. Sharding Sphinx — bigger stats
6. Antagonist Incorporator — bigger stats
7. Weeping Angel — bigger stats
8. Bio-Asset Allocator — bigger stats
9. SP//dr, Piloted by Peni — bigger stats
10. Hive Mind Coprocessor — bigger stats

4,521 other cards care about it too. These are the ones with the most connections.

a creature it boosts — 19,392 cards in the game can cause this (Tempered Steel is one).

Tempered Steel gives:

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — bigger stats
2. HYDRA Assault Robot — bigger stats
3. Canoptek Spyder — bigger stats
4. Traxos, Scourge Eternal — bigger stats
5. Alibou, Ancient Witness — bigger stats
6. Bloodline Pretender — bigger stats
7. Molten Gatekeeper — bigger stats
8. Soultether Golem — bigger stats
9. The Peregrine Dynamo — bigger stats
10. Straw Golem — bigger stats

19,382 other cards care about it too. These are the ones with the most connections.