Astrid, Mother of Worlds

When Astrid, Mother of Worlds enters, exile {x}
cards from the top of every players' library. You may play cards without paying their mana cost.

As long you control a dove, Astrid, Mother of Worlds isn't a creature.

{p/w}, Exile target creature until end of turn.

At the beginning of your upkeep, Astrid creates
a 2/2 white flying Dove creature token.