HYDRA Infiltration

a card is discarded — 2,042 cards in the game can cause this (HYDRA Infiltration is one).

When a permanent makes a player discard a card thanks to HYDRA Infiltration:

1. Sangromancer — gains you 3 life
2. Lo and Li, Royal Advisors — puts a counter on an Advisor
3. Nath of the Gilt-Leaf — makes a token
4. Tourach, Dread Cantor — puts a +1/+1 counter on itself
5. Tinybones, Pocket Nuisance — deals 1 damage
6. Tinybones, Bauble Burglar — hits a graveyard
7. Fell Specter — makes each opponent lose 2 life
8. Spirit Cairn — makes a token
9. Confessor — gains you 1 life
10. Hostile Investigator — triggers

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

life is gained — 2,076 cards in the game can cause this (HYDRA Infiltration is one).

When HYDRA Infiltration gains life:

1. Titanbones, Towering Heart — puts 2 +1/+1 counters on itself
2. Dina, Soul Steeper — makes each opponent lose 1 life
3. Marina Vendrell's Grimoire — draws you that many cards
4. South Wind Avatar — makes each opponent lose 1 life
5. Rodolf Duskbringer — grants indestructible
6. Fiendish Panda — puts a +1/+1 counter on itself
7. Veinwitch Coven — brings a card back
8. Cleric Class — puts a counter on a creature
9. Lich's Mastery — draws you that many cards
10. Wall of Limbs — puts a +1/+1 counter on itself

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

life is lost — 3,160 cards in the game can cause this (HYDRA Infiltration is one).

When a permanent makes a player lose life thanks to HYDRA Infiltration:

1. Far Fortune, End Boss — raises your speed
2. Zahur, Glory's Past — raises your speed
3. Mendicant Core, Guidelight — raises your speed
4. Aether Syphon — raises your speed
5. Vnwxt, Verbose Host — raises your speed
6. Embalmed Ascendant — raises your speed
7. Slick Imitator — raises your speed
8. Nesting Bot — raises your speed
9. Howlsquad Heavy — raises your speed
10. Hour of Victory — raises your speed

46 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 (HYDRA Infiltration is one).

When HYDRA Infiltration 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 (HYDRA Infiltration is one).

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

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

When HYDRA Infiltration 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

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

a card in a graveyard — 7,589 cards in the game can cause this (HYDRA Infiltration is one).

1. Bloodbond March — HYDRA Infiltration puts cards into the graveyard that Bloodbond March can bring back
2. Heart-Shaped Herb — HYDRA Infiltration puts cards into the graveyard that Heart-Shaped Herb can bring back
3. Enlightened Confidant — HYDRA Infiltration puts cards into the graveyard that Enlightened Confidant can bring back
4. Tergrid, God of Fright // Tergrid's Lantern — HYDRA Infiltration puts cards into the graveyard that Tergrid, God of Fright // Tergrid's Lantern can bring back
5. Grazing Kelpie — HYDRA Infiltration puts cards into the graveyard that Grazing Kelpie can bring back
6. Dauthi Voidwalker — Cards HYDRA Infiltration would put into an opponent's graveyard are exiled by Dauthi Voidwalker instead, and it can play from among them
7. Endurance — HYDRA Infiltration puts cards into the graveyard that Endurance can bring back
8. Thieves' Guild Enforcer — HYDRA Infiltration fills an opponent's graveyard toward the 8 or more cards Thieves' Guild Enforcer needs
9. Merfolk Windrobber — HYDRA Infiltration fills an opponent's graveyard toward the 8 or more cards Merfolk Windrobber needs

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