20 cards where the text includes “choose one” and the set is “afr”

A-Dawnbringer Cleric (Adventures in the Forgotten Realms #A-9)
Baleful Beholder (Adventures in the Forgotten Realms #89)
Choose Your Weapon (Adventures in the Forgotten Realms #175)
Dawnbringer Cleric (Adventures in the Forgotten Realms #9)
Inspiring Bard (Adventures in the Forgotten Realms #189)
Orcus, Prince of Undeath (Adventures in the Forgotten Realms #229)
Plundering Barbarian (Adventures in the Forgotten Realms #158)
Shambling Ghast (Adventures in the Forgotten Realms #119)
Wild Shape (Adventures in the Forgotten Realms #212)
You Come to a River (Adventures in the Forgotten Realms #83)
You Come to the Gnoll Camp (Adventures in the Forgotten Realms #168)
You Find a Cursed Idol (Adventures in the Forgotten Realms #213)
You Find Some Prisoners (Adventures in the Forgotten Realms #169)
You Find the Villains' Lair (Adventures in the Forgotten Realms #84)
You Happen On a Glade (Adventures in the Forgotten Realms #214)
You Hear Something on Watch (Adventures in the Forgotten Realms #42)
You Meet in a Tavern (Adventures in the Forgotten Realms #215)
You're Ambushed on the Road (Adventures in the Forgotten Realms #43)
You See a Guard Approach (Adventures in the Forgotten Realms #85)
You See a Pair of Goblins (Adventures in the Forgotten Realms #170)

The message was clear to Sorin—time to search for something else.