Eradicator Valkyrie
Creature — Angel Berserker
Boast — , Sacrifice a creature: Each opponent sacrifices a creature or planeswalker. (Activate only if this creature attacked this turn and only once each turn.)
Legal in
Pioneer, Modern, Legacy, Vintage, Commander, Brawl, Historic
Rulings (6)
Eradicator Valkyrie can't be the target of abilities whose source is a planeswalker an opponent controls.
2021-02-05
As the boast ability resolves, first the next opponent in turn order chooses a creature or planeswalker they control. Then each other opponent in turn order chooses a creature or planeswalker they control, knowing the choices made before their choice. Then all chosen creatures and planeswalkers are sacrificed at the same time.
2021-02-05
If a creature with a boast ability is put onto the battlefield attacking, it was never declared as an attacker. Its boast ability can't be activated that turn.
2021-02-05
If an effect adds additional combat phases to a turn and a creature with a boast ability attacks more than once during that turn, its boast ability can still be activated only once.
2021-02-05