Black Widow, Double Agent

a Villain enters the battlefield — 117 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent enters:

1. Doom Reigns Supreme — makes each opponent lose 1 life
2. Crossbones, Malicious Mercenary — puts a +1/+1 counter on itself
3. Yellowjacket, Heartless Marauder — gets +1/+0
4. Swordsman, Sharp Scoundrel — triggers
5. Baron Strucker, HYDRA Overlord — draws and discards

a Hero enters the battlefield — 116 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent enters:

1. Nighthawk, Dark Defender — gives +1/+1
2. Team Transmitter — gains you 1 life

a Human enters the battlefield — 1,907 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent 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. Beregond of the Guard — gives +1/+1
5. Lossarnach Captain — taps a creature an opponent controls

a creature attacks — 6,543 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent attacks:

1. Adaptive Omnitool — searches a library
2. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
3. Chorale of the Void — brings a card back
4. Hooded Blightfang — makes each opponent lose 1 life
5. Staff of Titania — makes a token
6. Glory Bearers — gives +0/+1
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Super-Soldier Serum — triggers

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

anything attacks — 6,543 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent attacks:

1. Grim Javelineer — gives +1/+0
2. ED-E, Lonesome Eyebot — puts a quest counter on itself
3. Surgical Suite // Hospital Room — puts a counter on a creature
4. Fire Navy Trebuchet — makes a token
5. Apothecary White — makes a token
6. Clavileño, First of the Blessed — turns something into a creature
7. Adeline, Resplendent Cathar — makes a token
8. Dalkovan Encampment — makes 2 tokens
9. Guide of Souls — triggers
10. Warren Warleader — triggers

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

a creature blocks — 6,543 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Barrow-Blade — strips abilities
3. Noble Stand — gains you 2 life
4. Battle Cry — gives +0/+1
5. Dead-Iron Sledge — kills a creature

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

a nontoken creature attacks — 6,543 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent attacks:

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

a creature deals combat damage — 6,543 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent deals combat damage:

1. Antagonist Incorporator — makes a token
2. Hive Mind Coprocessor — makes you lose life

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

a creature is cast — 6,565 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent is cast:

1. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
2. God-Eternal Oketra — makes a token
3. Oketra's Monument — makes a token
4. Skittering Horror — sacrifices itself
5. Skittering Skirge — sacrifices itself
6. Skittering Monstrosity — sacrifices itself
7. Oltec Matterweaver — triggers
8. Pure Reflection — kills a Reflection
9. Abigale, Poet Laureate // Heroic Stanza — becomes prepared
10. Bygone Bishop — triggers

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

a nontoken creature enters the battlefield — 6,870 cards in Black Widow's colors can cause this (Black Widow is one).

When Black Widow, Double Agent enters:

1. Angelic Sell-Sword — makes a token
2. Spirit Bonds — makes a token
3. Metastatic Evangel — proliferates
4. Minion Reflector — makes a token
5. Blessed Sanctuary — makes a token
6. Radiant Solar — triggers
7. Anafenza, Kin-Tree Spirit — puts a counter on a permanent

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

a creature enters the battlefield — 7,459 cards in Black Widow's colors can cause this (Black Widow is one).

1. Aetherstorm Roc — When Black Widow, Double Agent enters, Aetherstorm Roc puts a counter on a permanent you control

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

anything enters the battlefield — 10,830 cards in Black Widow's colors can cause this (Black Widow is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Black Widow, Double Agent enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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