Your search for "Mountain 306" revealed the following:
Mountain (302) (MRD) from Mirrodin, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: John Avon
Forest (306) (MRD) from Mirrodin, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: John Avon
Leona - Radiant Dawn (Signature) - 306*/298 - Showcase from Riftbound: Origins, available at 401 Games Canada. Rarity: Showcase Finish: Foil Artist: Su Ke Card Text:When you stun one or more enemy units, buff a friendly unit. (If it doesn't...