Serum Sovereign

cast a battle — 100 cards in the game can cause this.

1. Madame Web, Clairvoyant — When a Spider is cast thanks to Madame Web, Clairvoyant, Serum Sovereign puts a oil counter on itself
2. The Key to the Vault — When The Key to the Vault is cast, Serum Sovereign puts a oil counter on itself
3. Jace, Architect of Thought — When Jace, Architect of Thought is cast, Serum Sovereign puts a oil counter on itself
4. Invasion of Arcavios // Invocation of the Founders — When Invasion of Arcavios // Invocation of the Founders is cast, Serum Sovereign puts a oil counter on itself
5. Reenact the Crime — When Reenact the Crime is cast, Serum Sovereign puts a oil counter on itself
6. Treasure Keeper — When an artifact is cast thanks to Treasure Keeper, Serum Sovereign puts a oil counter on itself
7. Vision, Spectral Synthezoid — When a Robot is cast thanks to Vision, Spectral Synthezoid, Serum Sovereign puts a oil counter on itself
8. Haldan, Avid Arcanist — When an artifact is cast thanks to Haldan, Avid Arcanist, Serum Sovereign puts a oil counter on itself
9. Yue, the Moon Spirit — When an artifact is cast thanks to Yue, the Moon Spirit, Serum Sovereign puts a oil counter on itself
10. Wondrous Crucible — When Wondrous Crucible is cast, Serum Sovereign puts a oil counter on itself

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

a Sphinx attacks — 144 cards in the game can cause this (Serum Sovereign is one).

1. The Ur-Sphinx — When Serum Sovereign attacks, The Ur-Sphinx mills a card

a Sphinx enters the battlefield — 149 cards in the game can cause this (Serum Sovereign is one).

1. Unesh, Criosphinx Sovereign — When Serum Sovereign enters, Unesh, Criosphinx Sovereign triggers

cast a planeswalker — 361 cards in the game can cause this.

1. Kaito, Cunning Infiltrator — When Kaito, Cunning Infiltrator is cast, Serum Sovereign puts a oil counter on itself
2. Tezzeret, Cruel Captain — When Tezzeret, Cruel Captain is cast, Serum Sovereign puts a oil counter on itself
3. Teferi, Temporal Pilgrim — When Teferi, Temporal Pilgrim is cast, Serum Sovereign puts a oil counter on itself
4. Karn, Scion of Urza — When Karn, Scion of Urza is cast, Serum Sovereign puts a oil counter on itself
5. Chandra, Chill of Compliance — When Chandra, Chill of Compliance is cast, Serum Sovereign puts a oil counter on itself
6. Jace, Cunning Castaway — When Jace, Cunning Castaway is cast, Serum Sovereign puts a oil counter on itself
7. Kasmina, Enigmatic Mentor — When Kasmina, Enigmatic Mentor is cast, Serum Sovereign puts a oil counter on itself
8. Tezzeret, Artifice Master — When Tezzeret, Artifice Master is cast, Serum Sovereign puts a oil counter on itself
9. The Theorist, Jace Beleren — When The Theorist, Jace Beleren is cast, Serum Sovereign puts a oil counter on itself
10. Mordenkainen — When Mordenkainen is cast, Serum Sovereign puts a oil counter on itself

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

you scry — 420 cards in the game can cause this (Serum Sovereign is one).

When Serum Sovereign scries:

1. Prudent Fateseer // Peer Review — gives +1/+0
2. Diviner of Victory // Unwind History — gets +1/+1
3. Saheeli, Consul of Oversight — makes a token
4. Celeborn the Wise — makes your creatures bigger
5. Proft, Consulting Detective — puts a +1/+1 counter on itself
6. Matoya, Archon Elder — draws you 1 card
7. Denzilore Fatehold — puts a counter on a creature
8. Elminster — costs less
9. Elrond, Master of Healing — puts a counter on a creature
10. Galadriel of Lothlórien — puts a land onto the battlefield

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

a Phyrexian attacks — 495 cards in the game can cause this (Serum Sovereign is one).

1. Vulpine Harvester — When Serum Sovereign attacks, Vulpine Harvester brings a card back

a nontoken Phyrexian enters the battlefield — 496 cards in the game can cause this (Serum Sovereign is one).

1. Darksteel Splicer — When Serum Sovereign enters, Darksteel Splicer makes a token

a Phyrexian enters the battlefield — 524 cards in the game can cause this (Serum Sovereign is one).

1. Essence of Orthodoxy — When Serum Sovereign enters, Essence of Orthodoxy puts a counter on a permanent

a creature gets a counter — 2,691 cards in the game can cause this (Serum Sovereign is one).

When Serum Sovereign gets a counter:

1. Hollowmurk Siege — draws you 1 card
2. Generous Patron — draws you 1 card
3. Danny Pink — draws you 1 card
4. Bold Plagiarist — puts counters on a permanent
5. Mikey & Leo, Chaos & Order — draws you 1 card
6. Kros, Defense Contractor — triggers
7. Rikku, Resourceful Guardian — triggers

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

cast an enchantment — 3,673 cards in the game can cause this.

1. Candlekeep Sage — When Candlekeep Sage is cast, Serum Sovereign puts a oil counter on itself
2. They Came from the Pipes — When They Came from the Pipes is cast, Serum Sovereign puts a oil counter on itself
3. Illusory Gains — When Illusory Gains is cast, Serum Sovereign puts a oil counter on itself
4. Intruder Alarm — When Intruder Alarm is cast, Serum Sovereign puts a oil counter on itself
5. Virtue of Knowledge // Vantress Visions — When Virtue of Knowledge // Vantress Visions is cast, Serum Sovereign puts a oil counter on itself
6. Overburden — When Overburden is cast, Serum Sovereign puts a oil counter on itself
7. Kozilek's Unsealing — When Kozilek's Unsealing is cast, Serum Sovereign puts a oil counter on itself
8. Thopter Spy Network — When Thopter Spy Network is cast, Serum Sovereign puts a oil counter on itself
9. Mirror Mockery — When Mirror Mockery is cast, Serum Sovereign puts a oil counter on itself
10. Feywild Visitor — When Feywild Visitor is cast, Serum Sovereign puts a oil counter on itself

3,663 other cards cause it too. These are the ones with the most connections.

cast an artifact — 3,683 cards in the game can cause this.

1. Chimeric Egg — When Chimeric Egg is cast, Serum Sovereign puts a oil counter on itself
2. Tome of Legends — When Tome of Legends is cast, Serum Sovereign puts a oil counter on itself
3. Sword of Wealth and Power — When Sword of Wealth and Power is cast, Serum Sovereign puts a oil counter on itself
4. Cloudstone Curio — When Cloudstone Curio is cast, Serum Sovereign puts a oil counter on itself
5. Contested Game Ball — When Contested Game Ball is cast, Serum Sovereign puts a oil counter on itself
6. Portcullis — When Portcullis is cast, Serum Sovereign puts a oil counter on itself
7. Symmetry Matrix — When Symmetry Matrix is cast, Serum Sovereign puts a oil counter on itself
8. Decoction Module — When Decoction Module is cast, Serum Sovereign puts a oil counter on itself
9. Sword of the Meek — When Sword of the Meek is cast, Serum Sovereign puts a oil counter on itself
10. Doc Ock's Tentacles — When Doc Ock's Tentacles is cast, Serum Sovereign puts a oil counter on itself

3,673 other cards cause it too. These are the ones with the most connections.

cast a sorcery — 3,720 cards in the game can cause this.

1. Mission Briefing — When Mission Briefing is cast, Serum Sovereign puts a oil counter on itself
2. Sorcerous Squall — When Sorcerous Squall is cast, Serum Sovereign puts a oil counter on itself
3. Flawless Forgery — When Flawless Forgery is cast, Serum Sovereign puts a oil counter on itself
4. Spectral Arcanist — When an instant is cast thanks to Spectral Arcanist, Serum Sovereign puts a oil counter on itself
5. Jace, Vryn's Prodigy // Jace, Telepath Unbound — When an instant is cast thanks to Jace, Vryn's Prodigy // Jace, Telepath Unbound, Serum Sovereign puts a oil counter on itself
6. Diviner of Mist — When an instant is cast thanks to Diviner of Mist, Serum Sovereign puts a oil counter on itself
7. Jace's Mindseeker — When an instant is cast thanks to Jace's Mindseeker, Serum Sovereign puts a oil counter on itself
8. Helmut Zemo, Mastermind — When an instant is cast thanks to Helmut Zemo, Mastermind, Serum Sovereign puts a oil counter on itself
9. Quistis Trepe — When an instant is cast thanks to Quistis Trepe, Serum Sovereign puts a oil counter on itself
10. Daring Waverider — When an instant is cast thanks to Daring Waverider, Serum Sovereign puts a oil counter on itself

3,710 other cards cause it too. These are the ones with the most connections.

a card is drawn — 3,815 cards in the game can cause this (Serum Sovereign is one).

When Serum Sovereign makes a player draw a card:

1. Temmet, Naktamun's Will — gives +1/+1
2. Niv-Mizzet, Parun — deals 1 damage
3. Aether Syphon — mills a card
4. The Locust God — makes a token
5. Starving Revenant — makes each opponent lose 1 life
6. Diviner's Wand — gets +1/+1
7. Ominous Seas — puts a foreshadow counter on itself
8. Dream Trawler — gets +1/+0
9. Iron Man, Armored Avenger — puts a counter on a creature
10. The Astonishing Ant-Man — puts a +1/+1 counter on itself

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

anything gets a counter — 4,415 cards in the game can cause this (Serum Sovereign is one).

1. All Will Be One — When Serum Sovereign gets a counter, All Will Be One deals that much damage

8 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 (Serum Sovereign is one).

When Serum Sovereign attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Grim Javelineer — gives +1/+0
3. Invisible Woman — triggers
4. Caesar, Legion's Emperor — sacrifices a creature
5. Guide of Souls — triggers
6. Campsite Cuisine — sacrifices a Food
7. Gossip's Talent — triggers
8. Banon, the Returners' Leader — draws and discards
9. Toph, Earthbending Master — puts a counter on a permanent
10. Three Dog, Galaxy News DJ — sacrifices an Aura

115 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 (Serum Sovereign is one).

When Serum Sovereign 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

186 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 (Serum Sovereign is one).

1. Tide of War — When Serum Sovereign blocks, Tide of War sacrifices a creature

27 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 (Serum Sovereign is one).

When Serum Sovereign enters:

1. Scurry Oak — puts a counter on itself
2. Fathom Mage — puts a counter on itself
3. Lonis, Genetics Expert — puts a counter on itself
4. Slash, Reptile Rampager — deals 2 damage
5. Ray Fillet, Wave Warrior — puts a counter on itself
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

303 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 (Serum Sovereign is one).

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

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