Astral Barrier (5e Spell)
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As you notice an attack heading towards you a Shield of Astral Energy forms between you and your attacker adding extra resistance to the weapon swing. Make a DC 15 Constitution check if you succeed, reduce the damage by 1d6. You may only do this once per Short rest.
The number or times this may be cast per short rest increases by 1 at level 5, and again by 1 at levels 11 and 17.