Watertrap Weaver

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

1. Seafloor Oracle — When Watertrap Weaver deals combat damage, Seafloor Oracle draws you 1 card

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

When Watertrap Weaver 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 creature becomes tapped — 565 cards in the game can cause this (Watertrap Weaver is one).

When a creature becomes tapped thanks to Watertrap Weaver:

1. Stinging Licid — deals 2 damage
2. Gideon's Avenger — puts a +1/+1 counter on itself
3. Lust for War — deals 3 damage
4. Insolence — deals 2 damage
5. Seizures — deals 3 damage
6. Betrayal — draws you 1 card
7. Spirit Shackle — puts a counter on a permanent
8. Palliation Accord — puts a palliation counter on itself
9. Cryoshatter — kills a creature
10. Don't Move — kills a creature

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

a nontoken Wizard enters the battlefield — 1,243 cards in the game can cause this (Watertrap Weaver is one).

1. Inalla, Archmage Ritualist — When Watertrap Weaver enters, Inalla, Archmage Ritualist makes a token

a Wizard creature enters the battlefield — 1,264 cards in the game can cause this (Watertrap Weaver is one).

1. Diviner's Wand — When Watertrap Weaver enters, Diviner's Wand triggers

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

When Watertrap Weaver attacks:

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

113 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 (Watertrap Weaver is one).

When Watertrap Weaver attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Total War — kills a creature

182 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 (Watertrap Weaver is one).

When Watertrap Weaver blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Barrow-Blade — strips abilities
4. Heat of Battle — deals 1 damage
5. Battle Strain — deals 1 damage
6. Favor of the Woods — gains you 3 life
7. Tide of War — sacrifices a creature
8. Dead-Iron Sledge — kills a creature
9. Dwindle — kills a creature
10. Shield of the Righteous — triggers

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

a nontoken creature attacks — 17,934 cards in the game can cause this (Watertrap Weaver is one).

When Watertrap Weaver attacks:

1. Mardu Ascendancy — makes a token
2. Basri Ket — makes a token
3. Militia's Pride — makes a token

a creature deals combat damage — 17,934 cards in the game can cause this (Watertrap Weaver is one).

When Watertrap Weaver deals combat damage:

1. Locutus of Borg — makes a token
2. Antagonist Incorporator — makes a token
3. Hive Mind Coprocessor — makes you lose life

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

a creature is cast — 18,010 cards in the game can cause this (Watertrap Weaver is one).

1. Primeval Bounty — When Watertrap Weaver is cast, Primeval Bounty makes a token

90 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 (Watertrap Weaver is one).

When Watertrap Weaver 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

310 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 (Watertrap Weaver is one).

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

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