The Swarmweaver

an artifact attacks — 814 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

1. Bio-Asset Allocator — When The Swarmweaver attacks, Bio-Asset Allocator makes each opponent lose 1 life

an artifact deals combat damage — 814 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

1. Hive Mind Coprocessor — When The Swarmweaver deals combat damage, Hive Mind Coprocessor makes you lose life

a nontoken artifact deals combat damage — 814 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

1. Virulent Silencer — When The Swarmweaver deals combat damage, Virulent Silencer puts 2 counters on a permanent

provide a creature to sacrifice — 1,021 cards in The Swarmweaver's colors can cause this.

1. Birthing Ritual — The Swarmweaver makes fodder for Birthing Ritual

1,020 other cards cause it too. These are the ones with the most connections.

an artifact is cast — 2,608 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When The Swarmweaver is cast:

1. Patchwork Automaton — puts a +1/+1 counter on itself
2. Golem Foundry — puts a charge counter on itself
3. Lifesmith — gains you 3 life
4. Zuri, Warrior of Wakanda — puts a counter on a creature
5. Painsmith — gives +2/+0
6. Golem's Heart — gains you 1 life
7. Urza's Chalice — gains you 1 life
8. Solar Array — grants sunburst
9. Traxos, Scourge Eternal — untaps itself
10. Biotransference — makes you lose life

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

a token enters the battlefield — 1,401 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When an Insect enters thanks to The Swarmweaver:

1. Cloakwood Swarmkeeper — puts a +1/+1 counter on itself
2. Woodland Champion — puts that many +1/+1 counters on itself
3. Wildwood Mentor — puts a +1/+1 counter on itself

a token is created — 1,402 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When The Swarmweaver makes an Insect token:

1. Idol of Oblivion — draws you 1 card
2. Mirkwood Bats — makes each opponent lose 1 life

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

a nontoken artifact enters the battlefield — 2,617 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When The Swarmweaver enters:

1. Ultron, Artificial Malevolence — makes a token
2. Surge Conductor — proliferates
3. Mirrorworks — makes a token

an artifact enters the battlefield — 2,889 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When The Swarmweaver enters:

1. Elvish Archivist — puts 2 +1/+1 counters on itself
2. Underhanded Designs — makes each opponent lose 1 life
3. Pactdoll Terror — makes each opponent lose 1 life
4. Arcbound Crusher — puts a +1/+1 counter on itself
5. Sarinth Steelseeker — searches a library
6. Arcbound Condor — shrinks a creature by -1/-1
7. Glaze Fiend — gets +2/+2
8. Battered Golem — untaps itself
9. Skorpekh Destroyer — grants first strike
10. Grinding Station — untaps itself

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

a creature attacks — 6,618 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When The Swarmweaver attacks:

1. Adaptive Omnitool — searches a library
2. Chorale of the Void — brings a card back
3. Staff of Titania — makes a token
4. Fractal Harness — puts counters on a permanent
5. Inquisitorial Rosette — makes a token
6. Wand of Orcus — grants deathtouch
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. Throwing Knife — sacrifices itself

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

anything attacks — 6,618 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When The Swarmweaver attacks:

1. Grim Javelineer — gives +1/+0
2. ED-E, Lonesome Eyebot — puts a quest counter on itself
3. Fire Navy Trebuchet — makes a token
4. Hollowmurk Siege — puts a counter on a creature
5. Stensian Sanguinist // Exsanguinate — grants deathtouch
6. Rev, Tithe Extractor — grants deathtouch
7. Boggart Prankster — gives +1/+0
8. Campsite Cuisine — sacrifices a Food
9. Toph, Earthbending Master — puts a counter on a permanent
10. Twins of Discord — triggers

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

a creature blocks — 6,618 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

When The Swarmweaver blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Barrow-Blade — strips abilities
3. Favor of the Woods — gains you 3 life
4. Gift of the Woods — gives +0/+3
5. Noxious Assault — puts a counter on a permanent
6. Ferocity — puts a counter on a permanent
7. Dead-Iron Sledge — kills a creature

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

a creature is cast — 6,648 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

1. Primeval Bounty — When The Swarmweaver is cast, Primeval Bounty makes a token

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

a creature enters the battlefield — 7,436 cards in The Swarmweaver's colors can cause this (The Swarmweaver is one).

1. Legolas Greenleaf — When The Swarmweaver enters, Legolas Greenleaf puts a counter on a permanent

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