Vivien, Champion of the Wilds

a planeswalker is cast — 361 cards in the game can cause this (Vivien is one).

1. Jaya's Phoenix — When Vivien, Champion of the Wilds is cast, Jaya's Phoenix returns itself from the graveyard
2. Interplanar Beacon — When Vivien, Champion of the Wilds is cast, Interplanar Beacon gains you 1 life
3. Defiler of Vigor — When Vivien, Champion of the Wilds is cast, Defiler of Vigor puts a counter on a creature
4. Primeval Bounty — When Vivien, Champion of the Wilds is cast, Primeval Bounty puts 3 counters on a creature
5. Tetsuko Umezawa, Pursuer — When Vivien, Champion of the Wilds is cast, Tetsuko Umezawa, Pursuer gets +1/+1
6. Thor, God of Thunder — When Vivien, Champion of the Wilds is cast, Thor, God of Thunder deals that spell's mana value damage
7. Krile Baldesion — When Vivien, Champion of the Wilds is cast, Krile Baldesion brings a card back
8. Summon: Good King Mog XII — When Vivien, Champion of the Wilds is cast, Summon: Good King Mog XII makes a token
9. Varis, Silverymoon Ranger — When a creature is cast thanks to Vivien, Champion of the Wilds, Varis, Silverymoon Ranger triggers
10. Blood Funnel — When Vivien, Champion of the Wilds is cast, Blood Funnel sacrifices a creature

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

a planeswalker enters the battlefield — 366 cards in the game can cause this (Vivien is one).

When Vivien, Champion of the Wilds enters:

1. Builder's Talent — puts a counter on a creature
2. Brainstealer Dragon — makes a player lose life equal to its mana value
3. Cloudstone Curio — triggers

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

anything is exiled — 2,497 cards in the game can cause this (Vivien is one).

1. The War Doctor — When a permanent is exiled thanks to Vivien, Champion of the Wilds, The War Doctor puts a time counter on itself
2. God-Eternal Bontu — When God-Eternal Bontu is exiled thanks to Vivien, Champion of the Wilds, it returns itself from the graveyard
3. God-Eternal Kefnet — When God-Eternal Kefnet is exiled thanks to Vivien, Champion of the Wilds, it returns itself from the graveyard
4. Ilharg, the Raze-Boar — When Ilharg, the Raze-Boar is exiled thanks to Vivien, Champion of the Wilds, it returns itself from the graveyard
5. God-Eternal Oketra — When God-Eternal Oketra is exiled thanks to Vivien, Champion of the Wilds, it triggers
6. God-Eternal Rhonas — When God-Eternal Rhonas is exiled thanks to Vivien, Champion of the Wilds, it triggers

a creature is cast — 18,010 cards in the game can cause this (Vivien is one).

When a creature is cast thanks to Vivien, Champion of the Wilds:

1. Bloodbond March — brings a card back
2. Dancing from Dark to Dawn — puts that spell's mana value counters on a creature
3. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
4. Summon: Fenrir — arrives with counters
5. Summon: Brynhildr — grants haste
6. Skittering Horror — sacrifices itself
7. Skittering Skirge — sacrifices itself
8. Skittering Monstrosity — sacrifices itself
9. Silverback Elder — triggers
10. Oltec Matterweaver — triggers

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

a creature it applies speed increase to — 19,392 cards in the game can cause this (Vivien is one).

Vivien, Champion of the Wilds gives:

1. Pollywog Prodigy — haste
2. Havengul Lich — haste
3. Saheeli, Radiant Creator — haste
4. Captain Jean-Luc Picard — haste
5. Windrider Wizard — haste
6. Master of Winds — haste
7. Sokka, Bold Boomeranger — haste
8. Invisible Woman — haste
9. Rockslide Sorcerer — haste
10. Umara Wizard // Umara Skyfalls — haste

19,382 other cards care about it too. These are the ones with the most connections.