Kellan, the Fae-Blooded // Birthright Boon

an Adventure sorcery is cast — 77 cards in the game can cause this (Kellan is one).

1. Lucky Clover — When Kellan, the Fae-Blooded // Birthright Boon is cast, Lucky Clover copies a spell

a Faerie deals combat damage — 217 cards in the game can cause this (Kellan is one).

When Kellan, the Fae-Blooded // Birthright Boon deals combat damage:

1. Nettling Nuisance — makes a token
2. Faerie Bladecrafter — puts a +1/+1 counter on itself
3. Alela, Cunning Conqueror — triggers

a Faerie attacks — 217 cards in the game can cause this (Kellan is one).

1. Talion's Messenger — When Kellan, the Fae-Blooded // Birthright Boon attacks, Talion's Messenger draws you 1 card

a Faerie creature is cast — 217 cards in the game can cause this (Kellan is one).

1. Archmage of Echoes — When Kellan, the Fae-Blooded // Birthright Boon is cast, Archmage of Echoes copies a spell

a Faerie enters the battlefield — 237 cards in the game can cause this (Kellan is one).

1. Obyra, Dreaming Duelist — When Kellan, the Fae-Blooded // Birthright Boon enters, Obyra, Dreaming Duelist makes each opponent lose 1 life

1 other card cares about it too. These are the ones with the most connections.

a sorcery is cast — 3,720 cards in the game can cause this (Kellan is one).

When Kellan, the Fae-Blooded // Birthright Boon is cast:

1. Spellweaver Volute — copies a spell
2. Lilah, Undefeated Slickshot — gets +1/+1
3. Niblis of Frost — gets +1/+1
4. Primeval Bounty — puts 3 counters on a creature
5. Tetsuko Umezawa, Pursuer — gets +1/+1
6. Thor, God of Thunder — deals that spell's mana value damage
7. Krile Baldesion — brings a card back
8. Summon: Good King Mog XII — makes a token
9. Kykar, Wind's Fury — makes a token
10. Blood Funnel — sacrifices a creature

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

a Human enters the battlefield — 4,639 cards in the game can cause this (Kellan is one).

When Kellan, the Fae-Blooded // Birthright Boon enters:

1. General Kudro of Drannith — hits a graveyard
2. Heronblade Elite — puts a +1/+1 counter on itself
3. Kyler, Sigardian Emissary — puts a +1/+1 counter on itself
4. Thalia's Lieutenant — puts a +1/+1 counter on itself
5. Champion of the Parish — puts a +1/+1 counter on itself
6. Captain of the Mists — untaps itself
7. Erkenbrand, Lord of Westfold — gives +1/+0
8. Beregond of the Guard — gives +1/+1
9. Théoden, King of Rohan — grants double strike
10. Lossarnach Captain — taps a creature an opponent controls

2 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 (Kellan is one).

When Kellan, the Fae-Blooded // Birthright Boon 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

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 (Kellan is one).

When Kellan, the Fae-Blooded // Birthright Boon 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. Saw — sacrifices a creature
7. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
8. Ultima Weapon — kills a creature an opponent controls
9. Path of Mettle // Metzali, Tower of Triumph — triggers

844 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 (Kellan is one).

When Kellan, the Fae-Blooded // Birthright Boon blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Tide of War — sacrifices a creature
3. Dead-Iron Sledge — kills a creature

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

a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Kellan is one).

1. Riku of Two Reflections — When Kellan, the Fae-Blooded // Birthright Boon enters, Riku of Two Reflections makes a token

32 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 (Kellan is one).

When Kellan, the Fae-Blooded // Birthright Boon enters:

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

3,027 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 (Kellan is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Kellan, the Fae-Blooded // Birthright Boon 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.