Hello rules forum! It's been a while.
I'm currently building a cleric of Zon-Kuthon and was wondering if I was understanding this ability correctly.
Death’s Kiss (Su): You can cause a creature to take on some of the traits of the undead with a melee touch attack. Touched creatures are treated as undead for the purposes of effects that heal or cause damage based on positive and negative energy. This effect lasts for a number of rounds equal to 1/2 your cleric level (minimum 1). It does not apply to the Turn Undead or Command Undead feats. You can use this ability a number of times per day equal to 3 + your Wisdom modifier.
Here is my interpretation of the ability:
Since the duration is 1/2 your character level and I assume that as a melee touch attack it requires a standard action to use (regardless if used against friend or foe), that means that for levels 1-3 the duration of the ability is 1 round. Which means that the effect of Death's Kiss are gone before the cleric who used the ability could cast a spell or channel energy. He is not able to use his own spells/channeling to take advantage of the effect until level 4.
So as I understand it, at low levels this ability is mostly worthless. The only times it would be useful is if the party was built around it, or if you were trying to use it proactively against enemies.
I did think of one way this problem may be alleviated. What if you cast an inflict spell, held the charge, and then used Death's Kiss on a living creature? The inflict spell was being held and will discharge automatically upon touching a creature, which the Death's Kiss ability requires. How would the sequence of events unfold? Would this successfully heal the target?