Every printing we track, with today's reference value. Cards someone is selling show the lowest price.
12 cards

Vi, Destructive
Riftbound Promotional Cards #036a/298

Riven, Shattered
Riftbound Promotional Cards #041a/166

Ahri, Alluring (Launch Exclusive)
Riftbound Promotional Cards #066/298

Caitlyn, Patrolling
Riftbound Promotional Cards #068a/298

Lulu, Whimsical
Riftbound Promotional Cards #110a/167

Heimerdinger, Inventor
Riftbound Promotional Cards #111a/298

Heimerdinger, Academy Instructor
Riftbound Promotional Cards #132/167

Warwick, Hunter
Riftbound Promotional Cards #159a/298

Teemo, Scout
Riftbound Promotional Cards #197/298

Jinx, Rebel
Riftbound Promotional Cards #202/298

Viktor, Leader
Riftbound Promotional Cards #246b/298

Bird // Brush
Riftbound Promotional Cards #T02 // T03