Letting Oko believe he held all the cards provided the perfect cover for her own scheme to unfold.

Outlaws of Thunder Junction

Vraska Joins Up

When Vraska Joins Up enters the battlefield, put a deathtouch counter on each creature you control.
Whenever a legendary creature you control deals combat damage to a player, draw a card.

When Vraska Joins Up enters, put a deathtouch counter on each creature you control.
Whenever a legendary creature you control deals combat damage to a player, draw a card.