Riku of Many Paths

a Wizard creature enters the battlefield — 829 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

1. Diviner's Wand — When Riku of Many Paths enters, Diviner's Wand triggers

provide a creature to sacrifice — 1,343 cards in Riku of Many Paths's colors can cause this.

1. Jalira, Master Polymorphist — Riku of Many Paths makes fodder for Jalira, Master Polymorphist
2. Polymorph — Riku of Many Paths makes fodder for Polymorph
3. Birthing Ritual — Riku of Many Paths makes fodder for Birthing Ritual
4. Industrial Advancement — Riku of Many Paths makes fodder for Industrial Advancement
5. Killer Instinct — Riku of Many Paths makes fodder for Killer Instinct
6. Proteus Staff — Riku of Many Paths makes fodder for Proteus Staff
7. Synthetic Destiny — Riku of Many Paths makes fodder for Synthetic Destiny
8. Divergent Transformations — Riku of Many Paths makes fodder for Divergent Transformations
9. Mass Polymorph — Riku of Many Paths makes fodder for Mass Polymorph
10. Transmogrify — Riku of Many Paths makes fodder for Transmogrify

1,333 other cards cause it too. These are the ones with the most connections.

a token enters the battlefield — 1,932 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

When a Bird enters thanks to Riku of Many Paths:

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 — 1,933 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

1. Idol of Oblivion — When Riku of Many Paths makes a Bird 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 — 2,482 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

1. All Will Be One — When a permanent gets a counter thanks to Riku of Many Paths, All Will Be One deals that much damage
2. Lonis, Genetics Expert — When Lonis, Genetics Expert gets a counter thanks to Riku of Many Paths, it triggers

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

a Human enters the battlefield — 1,935 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

When Riku of Many Paths enters:

1. Heronblade Elite — puts a +1/+1 counter on itself
2. Captain of the Mists — untaps itself
3. Erkenbrand, Lord of Westfold — gives +1/+0
4. Dawnhart Disciple — gets +1/+1
5. Vigilante Justice — deals 1 damage

a creature attacks — 9,684 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

When Riku of Many Paths 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. Saw — sacrifices a creature
7. Ultima Weapon — kills a creature an opponent controls
8. Total War — kills a creature
9. The Spear of Leonidas — triggers
10. Norin the Wary — flickers itself

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

anything attacks — 9,684 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

When Riku of Many Paths 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. Campsite Cuisine — sacrifices a Food
5. Gossip's Talent — triggers
6. Toph, Earthbending Master — puts a counter on a permanent
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

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

a creature blocks — 9,684 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

When Riku of Many Paths blocks:

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Favor of the Woods — gains you 3 life
5. Gift of the Woods — gives +0/+3
6. Noxious Assault — puts a counter on a permanent
7. Ferocity — puts a counter on a permanent
8. Tide of War — sacrifices a creature
9. Dead-Iron Sledge — kills a creature
10. Dwindle — kills a creature

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

a creature is cast — 9,731 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

When Riku of Many Paths 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. Summon: Brynhildr — grants haste
5. Eshki, Temur's Roar — puts a +1/+1 counter on itself
6. Mona Lisa, Ever Adaptable — makes a token
7. Herald of Ilharg — puts 2 +1/+1 counters on itself
8. Champions of the Perfect — draws you 1 card
9. Masked Admirers — returns itself from the graveyard
10. Silverback Elder — triggers

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

a creature enters the battlefield — 10,588 cards in Riku of Many Paths's colors can cause this (Riku of Many Paths is one).

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

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