Xanathar, Guild Kingpin
Adventures in the Forgotten Realms
#391
Legendary Creature — Beholder
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.
Illustrated by Kieran Yanner
Not legal
Standard
Legal
Modern
Legal
Pioneer
Legal
Legacy
Legal
Vintage
Not legal
Pauper
Legal
Commander
Legal
Brawl
Legal
Historic
Legal
Penny