What is a Jingle Mingle Deer? Jingle Mingle Deer is the first and unique collection of randomly generated NFTs on the blockchain in Croatia! Each reindeer is unique, created by a combination of body parts, clothing and accessories of the main lineup that pulls Santa’s sleighs: Donner, Prancer, Rudi, Viksen, Cupid, Comet, Blitzer, Dancer and Dasher.