Convalescence

A gentle, radiant light embraces a creature within range. The target regains a number of hit points equal to 1d6 + your spellcasting ability modifier. This spell has no effect on undead or constructs.

The spell becomes stronger (changing healing die) when you reach higher levels: a d8 at 5th level, a d10 at 10th level, and a d12 at 15th level.