Your search for "Fireborn Knight 210" revealed the following:
Fireborn Knight (ELD) from Throne of Eldraine, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Ben Maier Card Text:Double strike(R/W)(R/W)(R/W)(R/W): Fireborn Knight gets +1/+1 until end of turn.
Fireborn Knight (Foil) (ELD) from Throne of Eldraine, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Ben Maier Card Text:Double strike(R/W)(R/W)(R/W)(R/W): Fireborn Knight gets +1/+1 until end of turn.