Fortified Impact

When you hit a creature with a weapon attack or attack roll spell, you may spend your bonus action to gain temporary health equal to five times your level, a +2 bonus to Armor Class, and resistance to all spell damage. These effect last until the start of your next turn. Then if your Armor Class is 22 or higher, you may heal up to one other creature that you can see within 30 feet of you for an amount equal to your Armor Class and grant that creature a +2 bonus to Armor Class. These effects last until the start of your next turn.

You can not use this ability again until you complete a long rest.