Celestial - Restoration Ward

You point to a creature within range and a glowing rune appears in the air before them. The next time a creature takes damage before the end of the spell's duration, it regains 1d4 hit points after the incoming damage has been dealt.

The amount of hit points regained increases when you reach higher levels, becoming 2d4 at 5th level, 3d4 at 11th level, and 4d4 at 17th level.