Blood Operative

an Assassin deals combat damage — 212 cards in the game can cause this (Blood Operative is one).

When Blood Operative deals combat damage:

1. Layla Hassan — brings a card back
2. Ezio, Blade of Vengeance — draws you 1 card
3. Etrata, Deadly Fugitive — triggers
4. Jacob Frye — exiles a card from your graveyard

an Assassin attacks — 212 cards in the game can cause this (Blood Operative is one).

When Blood Operative 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 — 219 cards in the game can cause this.

1. Reaper's Scythe — Reaper's Scythe gives Blood Operative an extra creature type

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

surveil — 233 cards in the game can cause this.

1. Snarling Gorehound — When Snarling Gorehound surveils, Blood Operative makes you lose life
2. Grim Javelineer — When Grim Javelineer surveils, Blood Operative makes you lose life
3. Clandestine Meddler — When Clandestine Meddler surveils, Blood Operative makes you lose life
4. Sword of Once and Future — When Sword of Once and Future surveils, Blood Operative makes you lose life
5. Tricorder — When Tricorder surveils, Blood Operative makes you lose life
6. H.E.R.B.I.E., Lovable Robot — When H.E.R.B.I.E., Lovable Robot surveils, Blood Operative makes you lose life
7. Fandaniel, Telophoroi Ascian — When Fandaniel, Telophoroi Ascian surveils, Blood Operative makes you lose life
8. Cybernetic Specialist — When Cybernetic Specialist surveils, Blood Operative makes you lose life
9. Sanguine Spy — When Sanguine Spy surveils, Blood Operative makes you lose life
10. Starving Revenant — When Starving Revenant surveils, Blood Operative makes you lose life

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

a Vampire attacks — 484 cards in the game can cause this (Blood Operative is one).

When Blood Operative attacks:

1. Glass-Cast Heart — makes a token
2. Sanctum Seeker — makes each opponent lose 1 life

a nontoken Vampire attacks — 484 cards in the game can cause this (Blood Operative is one).

1. Mavren Fein, Dusk Apostle — When Blood Operative attacks, Mavren Fein, Dusk Apostle makes a token

a Vampire creature is cast — 484 cards in the game can cause this (Blood Operative is one).

1. Bloodlord of Vaasgoth — When Blood Operative is cast, Bloodlord of Vaasgoth grants bloodthirst

a Vampire deals combat damage — 484 cards in the game can cause this (Blood Operative is one).

When Blood Operative deals combat damage:

1. Rakish Heir — puts a counter on a permanent
2. Stensia Masquerade — puts a counter on a permanent

a Vampire enters the battlefield — 500 cards in the game can cause this (Blood Operative is one).

When Blood Operative enters:

1. Anje, Maid of Dishonor — makes a token
2. Forerunner of the Legion — gives +1/+1
3. Markov Enforcer — deals damage
4. Evelyn, the Covetous — exiles a card from a library

a creature leaves a graveyard — 1,302 cards in the game can cause this (Blood Operative is one).

When Blood Operative leaves a graveyard:

1. Grim Reaper's Scythe — makes a token
2. Syr Konrad, the Grim — deals 1 damage
3. Cyan, Vengeful Samurai — puts a +1/+1 counter on itself
4. Along the Crooked Way — puts a counter on a Goblin or Army
5. Skeleton Crew — makes a token
6. Desecrated Tomb — makes a token
7. Chalk Outline — makes a token
8. Insidious Roots — makes a token
9. Undead Hand Ninja — makes each opponent lose 1 life
10. Erebos's Titan — triggers

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

life is gained — 2,076 cards in the game can cause this (Blood Operative is one).

When Blood Operative gains life:

1. Dina, Soul Steeper — makes each opponent lose 1 life
2. Marina Vendrell's Grimoire — draws you that many cards
3. South Wind Avatar — makes each opponent lose 1 life
4. Rodolf Duskbringer — grants indestructible
5. Fiendish Panda — puts a +1/+1 counter on itself
6. Veinwitch Coven — brings a card back
7. Cleric Class — puts a counter on a creature
8. Lich's Mastery — draws you that many cards
9. Wall of Limbs — puts a +1/+1 counter on itself
10. Ratchet, Field Medic // Ratchet, Rescue Racer — triggers

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

anything is exiled — 2,497 cards in the game can cause this (Blood Operative is one).

1. The War Doctor — When a permanent is exiled thanks to Blood Operative, The War Doctor puts a time counter on itself

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

anything leaves a graveyard — 2,503 cards in the game can cause this (Blood Operative is one).

When Blood Operative leaves a graveyard:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

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

life is lost — 3,160 cards in the game can cause this (Blood Operative is one).

When Blood Operative makes a player lose life:

1. The Master of Lake-town — mills a card
2. Intermediate Chirography — puts a counter on a creature
3. Vilis, Broker of Blood — draws you that many cards
4. Vengeful Warchief — puts a +1/+1 counter on itself
5. Wax-Wane Witness — gets +1/+0
6. Moonstone Harbinger — gives +1/+0
7. Transcendence — gains you life
8. Oath of Lim-Dûl — sacrifices an enchantment
9. Lich's Tomb — sacrifices a permanent
10. Gonti's Machinations — puts a counter on a permanent you control

46 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 (Blood Operative is one).

When Blood Operative attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Invisible Woman — triggers

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

a creature is cast — 18,010 cards in the game can cause this (Blood Operative is one).

1. God-Eternal Oketra — When Blood Operative is cast, God-Eternal Oketra makes a token

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