In Greenlandic Inuit (Kalaallit) traditions, a tupilaq (tupilak, tupilait, or ᑐᐱᓚᒃ) was an avenging monster fabricated by a practitioner of witchcraft or shamanism by using various objects such as animal parts (bone, skin, hair, sinew, etc.) and even parts taken from the corpses of children. The creature was given life by ritualistic chants. It was then placed into the sea to seek and destroy a specific enemy.
The use of a tupilaq was risky, however, because if it was sent to destroy someone who had greater magical powers than the one who had formed it, it could be sent back to kill its maker instead, although the maker of tupilaq could escape by public confession of her or his own deed.
Santa Claus's reindeer form an imaginary team of flying reindeer traditionally held to pull the sleigh of Santa Claus and help him deliver Christmas gifts. The commonly cited names of the reindeer are Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner, and Blitzen. They are based on those used in the 1823 poem "A Visit from St. Nicholas" (commonly called "The Night Before Christmas"), which is arguably the basis of reindeer's popularity as Christmas symbols, and in which Donner and Blitzen were originally called Donder and Blixem respectively.
The subsequent popularity of the Christmas song "Rudolph the Red-Nosed Reindeer" has led to Rudolph often joining the list.