Kellan, the Fae-Blooded // Birthright Boon

an Adventure sorcery is cast — 20 cards in Kellan's colors can cause this (Kellan is one).

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

a sorcery is cast — 1,248 cards in Kellan's colors can cause this (Kellan is one).

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

1. Tetsuko Umezawa, Pursuer — gets +1/+1
2. Thor, God of Thunder — deals that spell's mana value damage
3. Summon: Good King Mog XII — makes a token
4. Soul-Scar Mage — gets +1/+1
5. Tomik, Izzet Sparkmage — gets +1/+1
6. Vindictive Flamestoker — puts a oil counter on itself
7. Heartfire Immolator — gets +1/+1
8. Blazing Bomb — puts a +1/+1 counter on itself
9. The Fantasticar — turns something into a creature
10. Artist's Talent — draws and discards

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

a Human enters the battlefield — 2,042 cards in Kellan's colors can cause this (Kellan is one).

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

1. Thalia's Lieutenant — puts a +1/+1 counter on itself
2. Champion of the Parish — puts a +1/+1 counter on itself
3. Erkenbrand, Lord of Westfold — gives +1/+0
4. Beregond of the Guard — gives +1/+1
5. Théoden, King of Rohan — grants double strike
6. Vigilante Justice — deals 1 damage
7. Lossarnach Captain — taps a creature an opponent controls

a creature attacks — 6,550 cards in Kellan's colors can cause this (Kellan is one).

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

1. Adaptive Omnitool — searches a library
2. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
3. Staff of Titania — makes a token
4. Saw — sacrifices a creature
5. Ultima Weapon — kills a creature an opponent controls
6. Path of Mettle // Metzali, Tower of Triumph — triggers
7. Total War — kills a creature
8. The Spear of Leonidas — triggers
9. Super-Soldier Serum — triggers
10. Norin the Wary — flickers itself

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

anything attacks — 6,550 cards in Kellan's colors can cause this (Kellan is one).

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

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Surgical Suite // Hospital Room — puts a counter on a creature
3. Apothecary White — makes a token
4. Guide of Souls — triggers
5. Banon, the Returners' Leader — draws and discards
6. Three Dog, Galaxy News DJ — sacrifices an Aura
7. Inti, Seneschal of the Sun — triggers
8. Gut, True Soul Zealot — sacrifices a creature or artifact
9. Cool but Rude — draws and discards
10. Swashbuckler Extraordinaire — sacrifices a Treasure

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

a creature blocks — 6,550 cards in Kellan's colors can cause this (Kellan is one).

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

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Noble Stand — gains you 2 life
5. Battle Cry — gives +0/+1
6. Tide of War — sacrifices a creature
7. Dead-Iron Sledge — kills a creature

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

a nontoken creature attacks — 6,550 cards in Kellan's colors can cause this (Kellan is one).

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

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

a creature it boosts — 7,167 cards in Kellan's colors can cause this (Kellan is one).

Kellan, the Fae-Blooded // Birthright Boon gives:

1. Captain Jean-Luc Picard — bigger stats
2. Rockslide Sorcerer — bigger stats
3. Skyfire Phoenix — bigger stats
4. HYDRA Assault Robot — bigger stats
5. Norn's Choirmaster — bigger stats
6. Bill Potts — bigger stats

7,160 other cards care about it too. These are the ones with the most connections.

a creature enters the battlefield — 7,303 cards in Kellan's colors can cause this (Kellan is one).

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

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
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

1,112 other cards care about it too. These are the ones with the most connections.

anything enters the battlefield — 10,759 cards in Kellan's colors 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

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