Mythic Tail Adept

Increase your Dexterity or Constitution score by 1, to a maximum of 20.

When you use your Tail Shield trait, the damage reduction increases to 1d10 instead of 1d8. If the triggering damage is cold damage, the additional reduction increases to 1d8 instead of 1d6. When you reduce damage from a creature within 5 feet of you using Tail Shield, you can force that creature to make a Dexterity saving throw (DC = 8 + your proficiency bonus + your Dexterity modifier). On a failure, the creature is knocked prone. You can use this feature a number of times equal to your proficiency bonus per long rest. When you fall, you take no damage if the fall is 20 feet or less. If the fall is greater than 20 feet, treat the fall as 20 feet shorter.