Blitzen

Charge. If Blitzen moves at least 15 feet straight toward a target and then hits it with an antler attack on the same turn, the target takes an extra 11 (2d10) piercing damage. If the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.

Ice Walk. Blitzen can move across icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn't cost him extra movement.

Magic Weapons. Blitzen's weapon attacks are magical.

On Blitzen. Blitzen can enter a rage as a bonus action. While raging, he has advantage on Strength checks and Strength saving throws, when he makes a melee weapon attack using Strength, he gains a +2 bonus to the damage roll, and he has resistance to bludgeoning, piercing, and slashing damage. His rage lasts for 1 minute, until he falls unconscious, or until he ends it as a bonus action. Once he has raged twice, he cannot do so again until the next dawn.

The North Pole. If Blitzen drops to 0 hit points or dies, his body is destroyed, but his essence travels back to Santa's domain in Frostfell, and he cannot take physical form until the next dawn.

Multiattack. Blitzen makes two attacks: one with his antlers and one with his hooves.

Antlers. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 11 (1d10 + 6) piercing damage, or 13 (1d10 + 8) piercing damage while raging.

Hooves. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage, or 17 (2d8 + 8) bludgeoning damage while raging.