Vivien, Monsters' Advocate
Legendary Planeswalker — Vivien
You may cast creature spells from the top of your library.
+1: Create a 3/3 green Beast creature token. Put your choice of a vigilance counter, a reach counter, or a trample counter on it.
−2: When you next cast a creature spell this turn, search your library for a creature card with lesser mana value, put it onto the battlefield, then shuffle.
Legal in
Pioneer, Modern, Legacy, Vintage, Commander, Brawl, Historic
Rulings (9)
The top card of your library isn't in your hand, so you can't cycle it, discard it, or activate any of its activated abilities.
2020-04-17
If you cast a mutating creature spell, you must choose a target for it before the triggered ability from Vivien's last ability puts a creature onto the battlefield. The creature you find can't be the target of the mutating creature spell.
2020-04-17
Normally, Vivien allows you to cast the top card of your library if it's a creature card, it's your main phase, and the stack is empty. If that creature card has flash, you'll be able to cast it any time you could cast an instant, even on an opponent's turn.
2020-04-17
For spells with in their mana costs, use the value chosen for X to determine the spell's mana value.
2020-04-17