Xanathar, Guild Kingpin - Promo Pack: Adventures in the Forgotten Realms - M - 239

Type: Legendary Creature — Beholder

English Effect:
At the beginning of your upkeep, choose target opponent. Until end of turn, that player can't cast spells, you may look at the top card of their library any time, you may play the top card of their library, and you may spend mana as though it were mana of any color to cast spells this way.

Efecto en Español:
(Texto en español no disponible)