https://worldbuilderblog.me/2015/02/24/release-the-mounts/
Reindeer CR: 1/2 (100 XP)
Large beast, unaligned
Armor Class: 10
Hit Points: 30 (4d10 + 8) 4d10+8
Speed:
50 ft
Skills:
Charge. If the reindeer moves at least 20 feet straight toward a target and the hits it with a ram attack on the same turn, the target takes an extra 7 (2d6) damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw of be knocked prone.
Senses: Passive persaption 10.
Languages: -
Challenge Rating: 1/2 (100 XP)
by Casey LaBar
Actions
Ram. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) bludgeoning damage.
Hooves. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (2d4 + 4) bludgeoning damage.
Ignores difficult terrains; Snowfields, Mountains, Frozen Ocean