Adamantine Veins

You instantly coagulate the blood around the walls of your blood vessels, causing your skin to become sturdier and absorb physical damage better.

when you take this reaction, you can reduce the damage you take from the triggering instance of Bludgeoning, Piercing or Slashing damage by 5. This spell is ineffective if the triggering damage is caused by an adamantine weapon.

At Higher Levels: when casting this spell with a spell slot of 2nd level of higher, the damage is reduced by a further 5 points for every level of the spell slot used above 1st. If you cast this spell with a spell slot of 5th level or higher, the spell can reduce the damage dealt by even adamantine weapons.