Xanathar, Guild Kingpin [Dungeons & Dragons: Adventures in the Forgotten Realms Prerelease Promos] Predh you may add X mana

you may add X mana of any one color

Then if there are fifteen or more artifact cards in your graveyard

{T}: Target creature can't be blocked this turn

"Don't let our creed fade

Create two 1/1 blue Faerie Dragon creature tokens with flying

Xanathar, Guild Kingpin [Dungeons & Dragons: Adventures in the Forgotten Realms Prerelease Promos] Predh you may add X manaSet: Dungeons & Dragons: Adventures in the Forgotten Realms Prerelease Promos Type: Legendary Creature Beholder Rarity: Mythic Cost: {4}{U}{B} 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.