Pollywog Symbiote

a Frog attacks — 135 cards in the game can cause this (Pollywog Symbiote is one).

1. Grolnok, the Omnivore — When Pollywog Symbiote attacks, Grolnok, the Omnivore mills a card

a Frog enters the battlefield — 140 cards in the game can cause this (Pollywog Symbiote is one).

1. Valley Mightcaller — When Pollywog Symbiote enters, Valley Mightcaller puts a +1/+1 counter on itself

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

When Pollywog Symbiote 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

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

a card is drawn — 3,815 cards in the game can cause this (Pollywog Symbiote is one).

When Pollywog Symbiote makes a player draw a card:

1. Temmet, Naktamun's Will — gives +1/+1
2. Niv-Mizzet, Parun — deals 1 damage
3. Aether Syphon — mills a card
4. The Locust God — makes a token
5. Starving Revenant — makes each opponent lose 1 life
6. Diviner's Wand — gets +1/+1
7. Ominous Seas — puts a foreshadow counter on itself
8. Dream Trawler — gets +1/+0
9. Iron Man, Armored Avenger — puts a counter on a creature
10. The Astonishing Ant-Man — puts a +1/+1 counter on itself

57 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 (Pollywog Symbiote is one).

1. Samwise Gamgee — Pollywog Symbiote puts cards into the graveyard that Samwise Gamgee can bring back
2. Bloodbond March — Pollywog Symbiote puts cards into the graveyard that Bloodbond March can bring back
3. Thor, God of Thunder — Pollywog Symbiote puts cards into the graveyard that Thor, God of Thunder can bring back
4. Gale, Waterdeep Prodigy — Pollywog Symbiote puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
5. Harness the Storm — Pollywog Symbiote puts cards into the graveyard that Harness the Storm can bring back
6. Transplant Theorist — Pollywog Symbiote puts cards into the graveyard that Transplant Theorist can bring back
7. Heart-Shaped Herb — Pollywog Symbiote puts cards into the graveyard that Heart-Shaped Herb can bring back
8. Wayward Angel — Pollywog Symbiote fills your graveyard toward the 7 or more cards Wayward Angel needs
9. Rescue from the Underworld — Pollywog Symbiote puts cards into the graveyard that Rescue from the Underworld can bring back
10. Victimize — Pollywog Symbiote puts cards into the graveyard that Victimize can bring back

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 (Pollywog Symbiote is one).

1. Quest for Ancient Secrets — When a card hits the graveyard thanks to Pollywog Symbiote, Quest for Ancient Secrets puts a quest counter on itself
2. Planar Void — When a card hits the graveyard thanks to Pollywog Symbiote, Planar Void hits a graveyard
3. Measure of Wickedness — When a card hits the graveyard thanks to Pollywog Symbiote, Measure of Wickedness gives an opponent control of itself
4. Energy Field — When a card hits the graveyard thanks to Pollywog Symbiote, Energy Field sacrifices itself
5. Dread — When Dread hits the graveyard thanks to Pollywog Symbiote, it triggers
6. Ulamog, the Infinite Gyre — When Ulamog, the Infinite Gyre hits the graveyard thanks to Pollywog Symbiote, it triggers
7. Hostility — When Hostility hits the graveyard thanks to Pollywog Symbiote, it triggers
8. Worldspine Wurm — When Worldspine Wurm hits the graveyard thanks to Pollywog Symbiote, it triggers
9. Purity — When Purity hits the graveyard thanks to Pollywog Symbiote, it triggers
10. Kozilek, Butcher of Truth — When Kozilek, Butcher of Truth hits the graveyard thanks to Pollywog Symbiote, it triggers

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

anything attacks — 17,934 cards in the game can cause this (Pollywog Symbiote is one).

When Pollywog Symbiote attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Invisible Woman — triggers
3. Caesar, Legion's Emperor — sacrifices a creature
4. Guide of Souls — triggers
5. Campsite Cuisine — sacrifices a Food
6. Gossip's Talent — triggers

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

a creature attacks — 17,934 cards in the game can cause this (Pollywog Symbiote is one).

When Pollywog Symbiote attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Saw — sacrifices a creature

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

a creature blocks — 17,934 cards in the game can cause this (Pollywog Symbiote is one).

1. Tide of War — When Pollywog Symbiote blocks, Tide of War sacrifices a creature

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

a creature enters the battlefield — 19,800 cards in the game can cause this (Pollywog Symbiote is one).

When Pollywog Symbiote enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Ray Fillet, Wave Warrior — puts a counter on itself
3. The Neutrinos — gets +1/+0
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Aetherstorm Roc — puts a counter on a permanent you control
6. Raphael, Most Attitude — exiles a card from your library

3,030 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 (Pollywog Symbiote is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Pollywog Symbiote enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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