Alien Symbiosis

an Aura enters the battlefield — 1,257 cards in the game can cause this (Alien Symbiosis is one).

When Alien Symbiosis enters:

1. Tanglespan Lookout — draws you 1 card
2. Chishiro, the Shattered Blade — makes a token

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

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

When Alien Symbiosis makes a player discard a card:

1. Ivora, Insatiable Heir — puts a +1/+1 counter on itself
2. Cool but Rude — deals 2 damage
3. Containment Construct — brings a card back
4. Moonstone, Harsh Mistress — brings a card back
5. Lazotep Chancellor — puts 2 counters on a Zombie or Army
6. Magmakin Artillerist — deals that much damage
7. Inti, Seneschal of the Sun — exiles a card from your library
8. Pitchstone Wall — sacrifices itself
9. Currency Converter — exiles it
10. Hostile Investigator — triggers

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

anything leaves a graveyard — 2,503 cards in the game can cause this (Alien Symbiosis is one).

When Alien Symbiosis leaves a graveyard:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

13 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 (Alien Symbiosis is one).

When Alien Symbiosis 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 (Alien Symbiosis is one).

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

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

When Alien Symbiosis 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

61 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 (Alien Symbiosis is one).

1. Samwise Gamgee — Alien Symbiosis puts cards into the graveyard that Samwise Gamgee can bring back
2. Bloodbond March — Alien Symbiosis puts cards into the graveyard that Bloodbond March can bring back
3. Gale, Waterdeep Prodigy — Alien Symbiosis puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
4. Harness the Storm — Alien Symbiosis puts cards into the graveyard that Harness the Storm can bring back
5. Transplant Theorist — Alien Symbiosis puts cards into the graveyard that Transplant Theorist can bring back
6. Heart-Shaped Herb — Alien Symbiosis puts cards into the graveyard that Heart-Shaped Herb can bring back
7. Wayward Angel — Alien Symbiosis fills your graveyard toward the 7 or more cards Wayward Angel needs
8. Rescue from the Underworld — Alien Symbiosis puts cards into the graveyard that Rescue from the Underworld can bring back
9. Locked in the Cemetery — Alien Symbiosis fills your graveyard toward the 5 or more cards Locked in the Cemetery needs
10. Sidequest: Card Collection // Magicked Card — Alien Symbiosis fills your graveyard toward the 8 or more cards Sidequest: Card Collection // Magicked Card needs

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

anything goes to a graveyard — 7,589 cards in the game can cause this (Alien Symbiosis is one).

When a card hits the graveyard thanks to Alien Symbiosis:

1. Quest for Ancient Secrets — puts a quest counter on itself
2. Planar Void — hits a graveyard
3. Measure of Wickedness — gives an opponent control of itself
4. Energy Field — sacrifices itself

7 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 (Alien Symbiosis is one).

1. Nature's Wrath — When Alien Symbiosis enters, Nature's Wrath makes a player sacrifice a Swamp or permanent

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