uncommon champion healing necromancy positive 

Cast [>] somatic

Range touch; Targets 1 willing living creature or 1 undead creature

Your hands become infused with positive energy, healing a living creature or damaging an undead creature with a touch.

If you use lay on hands on a willing living target, you restore 6 Hit Points; if the target is one of your allies, they also gain a +2 status bonus to AC for 1 round. Against an undead target, you deal 1d6 damage and it must attempt a basic Fortitude save; if it fails, it also takes a –2 status penalty to AC for 1 round.

Heightened (+1) The amount of healing increases by 6, and the damage to an undead target increases by 1d6.

Core Rulebook, page 387.