Primo, the Unbounded

provide a creature to sacrifice — 923 cards in Primo's colors can cause this.

1. Jalira, Master Polymorphist — Primo, the Unbounded makes fodder for Jalira, Master Polymorphist
2. Polymorph — Primo, the Unbounded makes fodder for Polymorph
3. Birthing Ritual — Primo, the Unbounded makes fodder for Birthing Ritual
4. Proteus Staff — Primo, the Unbounded makes fodder for Proteus Staff
5. Synthetic Destiny — Primo, the Unbounded makes fodder for Synthetic Destiny
6. Mass Polymorph — Primo, the Unbounded makes fodder for Mass Polymorph

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

a token enters the battlefield — 1,278 cards in Primo's colors can cause this (Primo is one).

When a Fractal enters thanks to Primo, the Unbounded:

1. Mister Fantastic, Reed Richards — draws you 1 card
2. Cloakwood Swarmkeeper — puts a +1/+1 counter on itself
3. Woodland Champion — puts that many +1/+1 counters on itself
4. Wildwood Mentor — puts a +1/+1 counter on itself
5. Junk Winder — taps a creature, artifact, enchantment, planeswalker or battle an opponent controls

a token is created — 1,279 cards in Primo's colors can cause this (Primo is one).

1. Idol of Oblivion — When Primo, the Unbounded makes a Fractal token, Idol of Oblivion draws you 1 card

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

anything gets a counter — 1,933 cards in Primo's colors can cause this (Primo is one).

1. Lonis, Genetics Expert — When Lonis, Genetics Expert gets a counter thanks to Primo, the Unbounded, it triggers

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

a creature attacks — 6,391 cards in Primo's colors can cause this (Primo is one).

When Primo, the Unbounded attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Screaming Swarm — mills a card
4. Imperious Mindbreaker — mills a card
5. Staff of Titania — makes a token
6. Fractal Harness — puts counters on a permanent
7. Inquisitorial Rosette — makes a token
8. Saw — sacrifices a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Throwing Knife — sacrifices itself

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

anything attacks — 6,391 cards in Primo's colors can cause this (Primo is one).

When Primo, the Unbounded attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Madame Web, Clairvoyant — mills a card
3. Bonny Pall, Clearcutter — draws you 1 card
4. Hazardroot Herbalist — gives +1/+0
5. Ranger Class — puts a counter on a creature
6. Campsite Cuisine — sacrifices a Food
7. Gossip's Talent — triggers
8. Toph, Earthbending Master — puts a counter on a permanent
9. Alora, Merry Thief — triggers
10. Twins of Discord — triggers

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

a creature blocks — 6,391 cards in Primo's colors can cause this (Primo is one).

When Primo, the Unbounded blocks:

1. Barrow-Blade — strips abilities
2. Favor of the Woods — gains you 3 life
3. Gift of the Woods — gives +0/+3
4. Noxious Assault — puts a counter on a permanent
5. Ferocity — puts a counter on a permanent
6. Mammoth Harness — grants first strike
7. Dead-Iron Sledge — kills a creature
8. Dwindle — kills a creature

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

a creature deals combat damage — 6,391 cards in Primo's colors can cause this.

1. Umara Wizard // Umara Skyfalls — When Umara Wizard // Umara Skyfalls deals combat damage, Primo, the Unbounded makes a token
2. Ray Fillet, Wave Warrior — When Ray Fillet, Wave Warrior deals combat damage, Primo, the Unbounded makes a token
3. Simic Manipulator — When Simic Manipulator deals combat damage, Primo, the Unbounded makes a token
4. Cloudfin Raptor — When Cloudfin Raptor deals combat damage, Primo, the Unbounded makes a token
5. Dinosaur Egg — When Dinosaur Egg deals combat damage, Primo, the Unbounded makes a token
6. Elusive Krasis — When Elusive Krasis deals combat damage, Primo, the Unbounded makes a token
7. Tyranid Prime — When Tyranid Prime deals combat damage, Primo, the Unbounded makes a token
8. Yorvo, Lord of Garenbrig — When Yorvo, Lord of Garenbrig deals combat damage, Primo, the Unbounded makes a token
9. Renegade Doppelganger — When Renegade Doppelganger deals combat damage, Primo, the Unbounded makes a token
10. Unstable Shapeshifter — When Unstable Shapeshifter deals combat damage, Primo, the Unbounded makes a token

6,381 other cards cause it too. These are the ones with the most connections.

a creature is cast — 6,423 cards in Primo's colors can cause this (Primo is one).

When Primo, the Unbounded is cast:

1. Primeval Bounty — makes a token
2. Dancing from Dark to Dawn — puts that spell's mana value counters on a creature
3. Summon: Fenrir — it arrives with counters thanks to Summon: Fenrir
4. Mona Lisa, Ever Adaptable — makes a token
5. Champions of the Perfect — draws you 1 card
6. Masked Admirers — returns itself from the graveyard
7. Primordial Sage — draws you 1 card
8. Oketra's Monument — makes a token
9. Beast Whisperer — draws you 1 card
10. Silverback Elder — triggers

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

a nontoken creature enters the battlefield — 6,528 cards in Primo's colors can cause this (Primo is one).

When Primo, the Unbounded enters:

1. Dual Nature — makes a token
2. Arni, Humble Scribe — untaps itself
3. Bramble Sovereign — makes a token
4. Soul of the Harvest — draws you 1 card
5. Surrak and Goreclaw — puts a counter on a permanent
6. Rocksteady, Mutant Marauder — puts a counter on a creature
7. Radagast the Brown — searches a library
8. Minion Reflector — makes a token
9. Lonis, Cryptozoologist — triggers
10. Warden of the Grove — triggers

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

a creature enters the battlefield — 7,050 cards in Primo's colors can cause this (Primo is one).

1. Legolas Greenleaf — When Primo, the Unbounded enters, Legolas Greenleaf puts a counter on a permanent
2. Blasting Station — When a Fractal enters thanks to Primo, the Unbounded, Blasting Station untaps itself
3. Sage of the Falls — When a Fractal enters thanks to Primo, the Unbounded, Sage of the Falls draws you 1 card
4. Bloodline Pretender — When a Fractal enters thanks to Primo, the Unbounded, Bloodline Pretender puts a +1/+1 counter on itself
5. Monkey Cage — When a Fractal enters thanks to Primo, the Unbounded, Monkey Cage sacrifices itself

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