Kaysa

an Elf attacks — 422 cards in Kaysa's colors can cause this (Kaysa is one).

1. Celeborn the Wise — When Kaysa attacks, Celeborn the Wise scries
2. Arboreal Alliance — When Kaysa attacks, Arboreal Alliance triggers

a nontoken Elf enters the battlefield — 425 cards in Kaysa's colors can cause this (Kaysa is one).

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

an Elf enters the battlefield — 440 cards in Kaysa's colors 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. Elvish Vanguard — When Kaysa enters, Elvish Vanguard puts a +1/+1 counter on itself
4. Marwyn, the Nurturer — When Kaysa enters, Marwyn, the Nurturer puts a +1/+1 counter on itself
5. Woodland Weavemaster — When Kaysa enters, Woodland Weavemaster gets +1/+1

a creature attacks — 3,620 cards in Kaysa's colors can cause this (Kaysa is one).

1. Adaptive Omnitool — When Kaysa attacks, Adaptive Omnitool searches a library
2. Staff of Titania — When Kaysa attacks, Staff of Titania makes a token
3. Fractal Harness — When Kaysa attacks, Fractal Harness puts counters on a permanent
4. Inquisitorial Rosette — When Kaysa attacks, Inquisitorial Rosette makes a token
5. Andúril, Flame of the West — When Kaysa attacks, Andúril, Flame of the West makes 2 tokens
6. Moonsilver Spear — When Kaysa attacks, Moonsilver Spear makes a token
7. Captain's Claws — When Kaysa attacks, Captain's Claws makes a token
8. Saw — When Kaysa attacks, Saw sacrifices a creature
9. Ultima Weapon — When Kaysa attacks, Ultima Weapon kills a creature an opponent controls
10. Throwing Knife — When Kaysa attacks, Throwing Knife sacrifices itself

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

anything attacks — 3,620 cards in Kaysa's colors can cause this (Kaysa is one).

1. ED-E, Lonesome Eyebot — When Kaysa attacks, ED-E, Lonesome Eyebot puts a quest counter on itself
2. Hazardroot Herbalist — When Kaysa attacks, Hazardroot Herbalist gives +1/+0
3. Ranger Class — When Kaysa attacks, Ranger Class puts a counter on a creature
4. Dawnsire, Sunstar Dreadnought — When Kaysa attacks, Dawnsire, Sunstar Dreadnought deals 100 damage
5. Hunter's Talent — When Kaysa attacks, Hunter's Talent gives +1/+0
6. Campsite Cuisine — When Kaysa attacks, Campsite Cuisine sacrifices a Food
7. Toph, Earthbending Master — When Kaysa attacks, Toph, Earthbending Master puts a counter on a permanent
8. Twins of Discord — When Kaysa attacks, Twins of Discord triggers
9. Cosmic Cube — When Kaysa attacks, Cosmic Cube triggers
10. Doom's Time Platform — When Kaysa attacks, Doom's Time Platform exiles a card from your graveyard

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

a creature blocks — 3,620 cards in Kaysa's colors can cause this (Kaysa is one).

1. Barrow-Blade — When Kaysa blocks, Barrow-Blade strips abilities
2. Favor of the Woods — When Kaysa blocks, Favor of the Woods gains you 3 life
3. Gift of the Woods — When Kaysa blocks, Gift of the Woods gives +0/+3
4. Noxious Assault — When Kaysa blocks, Noxious Assault puts a counter on a permanent
5. Ferocity — When Kaysa blocks, Ferocity puts a counter on a permanent
6. Mammoth Harness — When Kaysa blocks, Mammoth Harness grants first strike
7. Dead-Iron Sledge — When Kaysa blocks, Dead-Iron Sledge kills a creature

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

a creature is cast — 3,640 cards in Kaysa's colors can cause this (Kaysa is one).

1. Primeval Bounty — When Kaysa is cast, Primeval Bounty makes a token
2. Dancing from Dark to Dawn — When Kaysa is cast, Dancing from Dark to Dawn puts that spell's mana value counters on a creature
3. Summon: Fenrir — When Kaysa is cast, it arrives with counters thanks to Summon: Fenrir
4. Mona Lisa, Ever Adaptable — When Kaysa is cast, Mona Lisa, Ever Adaptable makes a token
5. Champions of the Perfect — When Kaysa is cast, Champions of the Perfect draws you 1 card
6. Masked Admirers — When Kaysa is cast, Masked Admirers returns itself from the graveyard
7. Primordial Sage — When Kaysa is cast, Primordial Sage draws you 1 card
8. Oketra's Monument — When Kaysa is cast, Oketra's Monument makes a token
9. Beast Whisperer — When Kaysa is cast, Beast Whisperer draws you 1 card
10. Silverback Elder — When Kaysa is cast, Silverback Elder triggers

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

a nontoken creature enters the battlefield — 3,710 cards in Kaysa's colors can cause this (Kaysa is one).

1. Dual Nature — When Kaysa enters, Dual Nature makes a token
2. Bramble Sovereign — When Kaysa enters, Bramble Sovereign makes a token
3. Soul of the Harvest — When Kaysa enters, Soul of the Harvest draws you 1 card
4. Surrak and Goreclaw — When Kaysa enters, Surrak and Goreclaw puts a counter on a permanent
5. Rocksteady, Mutant Marauder — When Kaysa enters, Rocksteady, Mutant Marauder puts a counter on a creature
6. Radagast the Brown — When Kaysa enters, Radagast the Brown searches a library
7. Minion Reflector — When Kaysa enters, Minion Reflector makes a token
8. The Great Henge — When Kaysa enters, The Great Henge puts a counter on a permanent
9. Guardian Project — When Kaysa enters, Guardian Project draws you 1 card
10. Warden of the Grove — When Kaysa enters, Warden of the Grove triggers

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

a creature enters the battlefield — 4,064 cards in Kaysa's colors can cause this (Kaysa is one).

1. Legolas Greenleaf — When Kaysa enters, Legolas Greenleaf puts a counter on a permanent
2. Blasting Station — When Kaysa enters, Blasting Station untaps itself
3. Bloodline Pretender — When Kaysa enters, Bloodline Pretender puts a +1/+1 counter on itself
4. Scurry Oak — When Kaysa enters, Scurry Oak puts a counter on itself
5. Monkey Cage — When Kaysa enters, Monkey Cage sacrifices itself

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