The Squadron Sinister

hits creature — 849 cards in The Squadron Sinister's colors can cause this.

1. Jalira, Master Polymorphist — Jalira, Master Polymorphist can put The Squadron Sinister onto the battlefield from your library
2. Polymorph — Polymorph can put The Squadron Sinister onto the battlefield from your library
3. Industrial Advancement — Industrial Advancement can put The Squadron Sinister onto the battlefield from your library
4. Proteus Staff — Proteus Staff can put The Squadron Sinister onto the battlefield from your library
5. Synthetic Destiny — Synthetic Destiny can put The Squadron Sinister onto the battlefield from your library
6. Divergent Transformations — Divergent Transformations can put The Squadron Sinister onto the battlefield from your library
7. Transmogrify — Transmogrify can put The Squadron Sinister onto the battlefield from your library
8. Mass Polymorph — Mass Polymorph can put The Squadron Sinister onto the battlefield from your library
9. Chaos Mutation — Chaos Mutation can put The Squadron Sinister onto the battlefield from your library
10. Lukka, Coppercoat Outcast — Lukka, Coppercoat Outcast can put The Squadron Sinister onto the battlefield from your library
11. Identity Echo — Identity Echo can put The Squadron Sinister onto the battlefield from your library

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

a Villain deals combat damage — 87 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

1. Stilt-Man, Towering Terror — When The Squadron Sinister deals combat damage, Stilt-Man, Towering Terror triggers

a Villain enters the battlefield — 91 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

1. Flying Octobot — When The Squadron Sinister enters, Flying Octobot puts a +1/+1 counter on itself

a Human enters the battlefield — 1,353 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

When The Squadron Sinister enters:

1. Captain of the Mists — untaps itself
2. Erkenbrand, Lord of Westfold — gives +1/+0
3. Vigilante Justice — deals 1 damage

a creature attacks — 6,189 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

When The Squadron Sinister attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Teo, Spirited Glider — draws you 1 card
4. Shadow Puppeteers — turns something into a creature
5. Screaming Swarm — mills a card
6. Imperious Mindbreaker — mills a card
7. Saw — sacrifices a creature
8. Ultima Weapon — kills a creature an opponent controls
9. Total War — kills a creature
10. The Spear of Leonidas — triggers

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

a creature blocks — 6,189 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

When The Squadron Sinister blocks:

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Tide of War — sacrifices a creature
5. Dead-Iron Sledge — kills a creature
6. Dwindle — kills a creature

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

anything attacks — 6,189 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

When The Squadron Sinister attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Madame Web, Clairvoyant — mills a card
3. Shaun, Father of Synths — makes a token
4. Misty Mountains Raider — puts 2 counters on a Goblin or Army
5. Razorkin Hordecaller — makes a token
6. Gossip's Talent — triggers
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

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

a creature is cast — 6,218 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

When The Squadron Sinister is cast:

1. Summon: Brynhildr — grants haste
2. Oketra's Monument — makes a token
3. Screamer-Killer — deals 5 damage
4. Kozilek's Unsealing — draws you 3 cards
5. The Clone Saga — copies a spell
6. Customs Depot — draws you 1 card
7. Bontu's Monument — makes each opponent lose 1 life
8. Vanquisher's Banner — draws you 1 card
9. Hazoret's Monument — draws and discards
10. Aether Barrier — makes a player sacrifice a permanent

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

a nontoken creature enters the battlefield — 6,294 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

When The Squadron Sinister enters:

1. Arni, Humble Scribe — untaps itself
2. Minion Reflector — makes a token
3. Molten Echoes — makes a token
4. Flameshadow Conjuring — makes a token

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

a creature enters the battlefield — 6,749 cards in The Squadron Sinister's colors can cause this (The Squadron Sinister is one).

When The Squadron Sinister enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
3. Ray Fillet, Wave Warrior — puts a counter on itself
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Raphael, Most Attitude — exiles a card from your library

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