Nicholas of Myra (a.k.a. St. Nicholas, Santa Claus) winds up for a little smackdown on Arius at the Council of Nicea, A.D. 325. This is my Santa: lie about my Jesus, and prepare for more than coal in your stocking!
On a serious note, Arius' false teaching about Jesus (He is not the eternal Son of God, but was a creation, a special man who became God) is regurgitated every generation. Church, if you've gotta "Santa," then "Santa up" for Jesus and "contend earnestly for the faith which was once for all handed down to the saints" (Jude 3).