Astral Seal

You strike your enemy with the silvery glow reminiscent of the Astral Sea, and its healing light suffuses your ally. Make a ranged spell attack. On a hit, the creature takes 1d4 radiant damage. In addition, the next ally to successfully hit the target before the start of your next turn with a melee attack gains 2 temporary hit points. These temporary hit points last for 1 minute or until they're used.