Vren, the Relentless

a Rat attacks — 119 cards in Vren's colors can cause this (Vren is one).

1. Persistent Marshstalker — When Vren, the Relentless attacks, Persistent Marshstalker returns itself from the graveyard

a Rat enters the battlefield — 132 cards in Vren's colors can cause this (Vren is one).

1. Lord Skitter, Sewer King — When a Rat enters thanks to Vren, the Relentless, Lord Skitter, Sewer King hits a graveyard

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

a Rogue attacks — 388 cards in Vren's colors can cause this (Vren is one).

1. Soaring Thought-Thief — When Vren, the Relentless attacks, Soaring Thought-Thief mills a card

a Rogue deals combat damage — 388 cards in Vren's colors can cause this (Vren is one).

1. Anowon, the Ruin Thief — When Vren, the Relentless deals combat damage, Anowon, the Ruin Thief mills a card

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

a Rogue creature enters the battlefield — 407 cards in Vren's colors can cause this (Vren is one).

1. Cloak and Dagger — When Vren, the Relentless enters, Cloak and Dagger triggers

a Rogue enters the battlefield — 409 cards in Vren's colors can cause this (Vren is one).

1. Thieves' Guild Enforcer — When Vren, the Relentless enters, Thieves' Guild Enforcer mills a card

a creature is exiled — 385 cards in Vren's colors can cause this (Vren is one).

1. Ashnod's Intervention — When a creature is exiled thanks to Vren, the Relentless, Ashnod's Intervention brings a card back

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

provide a creature to sacrifice — 805 cards in Vren's colors can cause this.

1. Jalira, Master Polymorphist — Vren, the Relentless makes fodder for Jalira, Master Polymorphist
2. Polymorph — Vren, the Relentless makes fodder for Polymorph
3. Proteus Staff — Vren, the Relentless makes fodder for Proteus Staff
4. Synthetic Destiny — Vren, the Relentless makes fodder for Synthetic Destiny
5. Mass Polymorph — Vren, the Relentless makes fodder for Mass Polymorph

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

a token enters the battlefield — 1,135 cards in Vren's colors can cause this (Vren is one).

When a Rat enters thanks to Vren, the Relentless:

1. Mister Fantastic, Reed Richards — draws you 1 card
2. Junk Winder — taps a creature, artifact, enchantment, planeswalker or battle an opponent controls

a token is created — 1,136 cards in Vren's colors can cause this (Vren is one).

When Vren, the Relentless makes a Rat token:

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

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

a creature leaves the battlefield — 2,165 cards in Vren's colors can cause this (Vren is one).

When a creature leaves the battlefield thanks to Vren, the Relentless:

1. Extractor Demon — mills a card
2. Traveling Plague — returns itself from the graveyard
3. Funeral March — makes a player sacrifice a creature

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

a creature attacks — 6,258 cards in Vren's colors can cause this (Vren is one).

When Vren, the Relentless attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Chorale of the Void — brings a card back
4. Screaming Swarm — mills a card
5. Imperious Mindbreaker — mills a card
6. Staff of Titania — makes a token
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

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

anything attacks — 6,258 cards in Vren's colors can cause this (Vren is one).

When Vren, the Relentless 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. Madame Web, Clairvoyant — mills a card
5. Dimir Strandcatcher — surveils
6. Stensian Sanguinist // Exsanguinate — grants deathtouch
7. Rev, Tithe Extractor — grants deathtouch
8. Gossip's Talent — triggers
9. Krydle of Baldur's Gate — triggers
10. Alora, Merry Thief — triggers

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

a creature blocks — 6,258 cards in Vren's colors can cause this (Vren is one).

When Vren, the Relentless blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Barrow-Blade — strips abilities
3. Dead-Iron Sledge — kills a creature
4. Dwindle — kills a creature

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

a creature deals combat damage — 6,258 cards in Vren's colors can cause this (Vren is one).

1. Hive Mind Coprocessor — When Vren, the Relentless deals combat damage, Hive Mind Coprocessor makes you lose life

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

a creature is cast — 6,287 cards in Vren's colors can cause this (Vren is one).

When Vren, the Relentless is cast:

1. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
2. Oketra's Monument — makes a token
3. Kozilek's Unsealing — makes 2 tokens
4. The Clone Saga — copies a spell
5. Customs Depot — draws you 1 card
6. Skittering Horror — sacrifices itself
7. Skittering Skirge — sacrifices itself
8. Skittering Monstrosity — sacrifices itself
9. Hazoret's Monument — draws and discards
10. Aether Barrier — makes a player sacrifice a permanent

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

a nontoken creature enters the battlefield — 6,508 cards in Vren's colors can cause this (Vren is one).

When Vren, the Relentless enters:

1. Arni, Humble Scribe — untaps itself
2. Minion Reflector — makes a token
3. Overburden — triggers

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

a creature enters the battlefield — 6,953 cards in Vren's colors can cause this (Vren is one).

1. Ray Fillet, Wave Warrior — When Vren, the Relentless enters, Ray Fillet, Wave Warrior puts a counter on itself
2. Pollywog Prodigy — When Vren, the Relentless enters, Pollywog Prodigy puts a counter on itself
3. Ayara, First of Locthwain — When a Rat enters thanks to Vren, the Relentless, Ayara, First of Locthwain makes each opponent lose 1 life
4. Blasting Station — When a Rat enters thanks to Vren, the Relentless, Blasting Station untaps itself
5. Sage of the Falls — When a Rat enters thanks to Vren, the Relentless, Sage of the Falls draws you 1 card
6. Bloodline Pretender — When a Rat enters thanks to Vren, the Relentless, Bloodline Pretender puts a +1/+1 counter on itself
7. Sage's Row Denizen — When Vren, the Relentless enters, Sage's Row Denizen mills a card
8. Monkey Cage — When a Rat enters thanks to Vren, the Relentless, Monkey Cage sacrifices itself

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