Reindeer

A reindeer is a species of animal native to colder regions.

According to legend, on Christmas Eve eight reindeer pull Santa Claus. The reindeer take the jolly figure to each home around the world to deliver presents to all the good boys and girls.

Benjamin Grimm was aware of the figure and the legend. When Black Panther infiltrated the Four Freedoms Plaza, Ben reasoned that since it was not Christmas the person was not Santa nor his reindeer.

Background
Reindeer were not seen, merely briefly mentioned by Thing.