Xanathar, Guild Kingpin - Promo Pack

Color: Multi-Color
Card Text: 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.
Rarity: P
Cost: 4UB
Pow/Tgh: 5/6
Card Type: Legendary Creature - Beholder
Artist: Kieran Yanner
Name: Xanathar, Guild Kingpin
Finish: Regular
Card Number: 239/281
Set Name: Promo Pack: Adventures in the Forgotten Realms