The Viking's religion affected Christianity as well. The pagan celebration of Yuletide became Christmas along with the custom of the Christmas tree. Priests blessing the fields took the place of pagan fertility rites of spring held to make sure there was a good harvest. Norse kept their "farm gods" well after Christianity just to make sure they were protected. Santa Claus owes much of his legend to the Norse god Odin. With his snow-white beard he traveled the midwinter sky on his eight-footed steed Sleipnir visiting his people with gifts. He became Father Christmas. Blended with the Christian Saint Nicholas he (they) became Santa Claus. 