Kelsien, the Plague

an Assassin deals combat damage — 149 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague deals combat damage:

1. Layla Hassan — brings a card back
2. Jacob Frye — exiles a card from your graveyard

an Assassin attacks — 149 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague attacks:

1. The Revelations of Ezio — puts a counter on a permanent
2. Origin of the Hidden Ones — makes a token

an Assassin creature it grants types to — 152 cards in Kelsien's colors can cause this.

1. Reaper's Scythe — Reaper's Scythe gives Kelsien, the Plague an extra creature type

151 other cards cause it too. These are the ones with the most connections.

anything deals noncombat damage — 2,411 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague deals noncombat damage:

1. Quest for Pure Flame — puts a quest counter on itself
2. Soul-Scar Mage — puts that many counters on a permanent
3. Fear of Burning Alive — deals that amount damage
4. Chandra's Incinerator — deals that much damage
5. Chandra's Pyreling — gets +1/+0
6. Talon of Pain — puts a charge counter on itself
7. Asgardian Inspiration — returns itself from the graveyard
8. Thor, Guardian of Midgard — exiles a card from your library
9. Virtue of Courage // Embereth Blaze — exiles a card from your library

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

anything gets a counter — 2,286 cards in Kelsien's colors can cause this (Kelsien is one).

1. All Will Be One — When a permanent gets a counter thanks to Kelsien, the Plague, All Will Be One deals that much damage

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

a Human enters the battlefield — 2,784 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague enters:

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

anything attacks — 9,901 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Grim Javelineer — gives +1/+0
3. ED-E, Lonesome Eyebot — puts a quest counter on itself
4. Surgical Suite // Hospital Room — puts a counter on a creature
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Banon, the Returners' Leader — draws and discards
8. Three Dog, Galaxy News DJ — sacrifices an Aura
9. Inti, Seneschal of the Sun — triggers
10. Gut, True Soul Zealot — sacrifices a creature or artifact

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

a creature attacks — 9,901 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague attacks:

1. Anthem of Rakdos — gives +2/+0
2. Adaptive Omnitool — searches a library
3. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
4. Chorale of the Void — brings a card back
5. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
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
10. Total War — kills a creature

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

a creature blocks — 9,901 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague 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. Tide of War — sacrifices a creature
7. Dead-Iron Sledge — kills a creature

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

a nontoken creature attacks — 9,901 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague attacks:

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

a creature is dealt damage — 10,634 cards in Kelsien's colors can cause this (Kelsien is one).

1. Soul Link — When a creature is dealt damage thanks to Kelsien, the Plague, Soul Link gains you that much life

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

a creature enters the battlefield — 11,072 cards in Kelsien's colors can cause this (Kelsien is one).

When Kelsien, the Plague 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

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

anything enters the battlefield — 15,360 cards in Kelsien's colors can cause this (Kelsien is one).

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

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