Kaysa

an Elf attacks — 723 cards in the game can cause this (Kaysa is one).

1. Celeborn the Wise — When Kaysa attacks, Celeborn the Wise scries
2. Tyvar the Bellicose — When Kaysa attacks, Tyvar the Bellicose grants deathtouch
3. Harald Unites the Elves — When Kaysa attacks, Harald Unites the Elves shrinks a creature by -1/-1
4. Arboreal Alliance — When Kaysa attacks, Arboreal Alliance triggers

a nontoken Elf enters the battlefield — 728 cards in the game can cause this (Kaysa is one).

1. Wirewood Hivemaster — When Kaysa enters, Wirewood Hivemaster makes a token

an Elf enters the battlefield — 752 cards in the game can cause this (Kaysa is one).

1. Wolverine Riders — When Kaysa enters, Wolverine Riders gains you its toughness life
2. Elvish Warmaster — When Kaysa enters, Elvish Warmaster makes a token
3. Thranduil, the Elvenking — When Kaysa enters, Thranduil, the Elvenking draws you 2 cards
4. Elvish Vanguard — When Kaysa enters, Elvish Vanguard puts a +1/+1 counter on itself
5. Marwyn, the Nurturer — When Kaysa enters, Marwyn, the Nurturer puts a +1/+1 counter on itself
6. Woodland Weavemaster — When Kaysa enters, Woodland Weavemaster gets +1/+1
7. High Perfect Morcant — When Kaysa enters, High Perfect Morcant puts a counter on a permanent an opponent controls
8. Maralen, Fae Ascendant — When Kaysa enters, Maralen, Fae Ascendant exiles a card from an opponent's library

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

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

489 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 (Kaysa is one).

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

843 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 (Kaysa is one).

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

131 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 (Kaysa is one).

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

a creature it boosts — 19,392 cards in the game can cause this (Kaysa is one).

1. Saheeli, Radiant Creator — Kaysa gives Saheeli, Radiant Creator bigger stats
2. Nakia, Wakandan Operative — Kaysa gives Nakia, Wakandan Operative bigger stats
3. Riku of Two Reflections — Kaysa gives Riku of Two Reflections bigger stats
4. Defiler of Vigor — Kaysa gives Defiler of Vigor bigger stats
5. Samwise Gamgee — Kaysa gives Samwise Gamgee bigger stats

19,386 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 (Kaysa is one).

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

3,028 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 (Kaysa is one).

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

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