Boon of Adamantine Bones (5e Epic Boon)

Your bones are magically coated with Adamantine, one of the hardest substances in existence.

Your limbs can no longer be severed or otherwise separated from your body, and your bones can no longer be broken.
Any critical hit against you becomes a normal hit.
When you add your Strength bonus to the damage of an attack, the damage increases by an additional 2.
Your weight increases by 10% of your current weight, and if you have a Strength of 16 or less you have disadvantage on all Dexterity saving throws, checks, and attack rolls. If you have a Strength of 10 or less, you have disadvantage on all Dexterity saving throws, checks, and attack rolls and -10 to all movement speeds.