Valki, God of Lies

As Tibalt enters, you get an emblem with "You may play cards exiled with Tibalt, Cosmic Impostor, and you may spend mana as though it were mana of any color to cast those spells."

[+2]: Exile the top card of each player's library.

[−3]: Exile target artifact or creature.

[−8]: Exile all graveyards. Add .