uncommon cleric evocation 

Domain magic

Cast [>] somatic

Range 30 feet; Targets 1 willing creature

Duration until the start of your next turn

The next damaging or healing spell the target casts before the start of your next turn deals damage or restores Hit Points as if the spell were heightened 1 level higher than its actual level. The spell otherwise functions at its actual level. Once the target casts the spell, mystic beacon ends.

Core Rulebook, page 394.