Merfolk Traders

a Merfolk deals combat damage — 386 cards in the game can cause this (Merfolk Traders is one).

1. Seafloor Oracle — When Merfolk Traders deals combat damage, Seafloor Oracle draws you 1 card

a Merfolk enters the battlefield — 397 cards in the game can cause this (Merfolk Traders is one).

When Merfolk Traders enters:

1. Forerunner of the Heralds — puts a +1/+1 counter on itself
2. Deeproot Elite — puts a counter on a Merfolk
3. River Sneak — gets +1/+1

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

When Merfolk Traders 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.

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

When Merfolk Traders 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 (Merfolk Traders is one).

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

When a card hits the graveyard thanks to Merfolk Traders:

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 attacks — 17,934 cards in the game can cause this (Merfolk Traders is one).

When Merfolk Traders attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Grim Javelineer — gives +1/+0
3. Invisible Woman — triggers
4. Caesar, Legion's Emperor — sacrifices a creature
5. Guide of Souls — triggers
6. Campsite Cuisine — sacrifices a Food
7. Gossip's Talent — triggers
8. Banon, the Returners' Leader — draws and discards
9. Toph, Earthbending Master — puts a counter on a permanent
10. Three Dog, Galaxy News DJ — sacrifices an Aura

120 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 (Merfolk Traders is one).

When Merfolk Traders 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

196 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 (Merfolk Traders is one).

1. Tide of War — When Merfolk Traders blocks, Tide of War sacrifices a creature

29 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 (Merfolk Traders is one).

When Merfolk Traders 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

348 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 (Merfolk Traders is one).

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

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