Vivien, Champion of the Wilds

Mana cost: {2}{G}
Type: Legendary Planeswalker — Vivien
Loyalty: 4
Set: Magic Online Promos #78013 (rare)

You may cast creature spells as though they had flash.
+1: Until your next turn, up to one target creature gains reach and vigilance.
−2: Look at the top three cards of your library. Exile one face down and put the rest on the bottom of your library in any order. For as long as it remains exiled, you may cast it if it's a creature spell.

Vivien, Champion of the Wilds has 9 printings, first in War of the Spark (2019). EDHREC ranks it #4,008 among Commander cards. It appears most in Kadena, Slinking Sorcerer decks (3,690 on EDHREC). 1 public deck on TCG runs it. It has 3 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: legal

Public decks that run Vivien, Champion of the Wilds

Exit from Exile - Commander Legends: Battle for Baldur's Gate, led by Faldorn, Dread Wolf Herald

Commanders that run Vivien, Champion of the Wilds most

Deck counts from EDHREC.

Kadena, Slinking Sorcerer: 3,690 decks
Fynn, the Fangbearer: 1,741 decks
Volo, Guide to Monsters: 1,562 decks
Ayula, Queen Among Bears: 1,441 decks
Faldorn, Dread Wolf Herald: 1,311 decks
Elda, Conjurer of Spectacle: 1,268 decks
Tovolar, Dire Overlord // Tovolar, the Midnight Scourge: 1,153 decks
Omnath, Locus of Mana: 880 decks

Often played with Vivien, Champion of the Wilds

Cards that show up in the same decks on EDHREC.

Rulings

2019-05-03: You must follow any applicable timing permissions and restrictions if you cast the exiled card. This means that if Vivien leaves the battlefield, you can't cast the creature spell as though it had flash unless another effect allows you to do so.
2019-05-03: Once you cast the creature card, it leaves exile. You can't cast it again if that card becomes exiled again.
2019-05-03: While resolving Vivien's last ability, you must exile one of the three cards, even if none of them are creature cards. You may look at the exiled card at any time, even if it's not a creature card.