We just fought some bone golems.
My cleric channeled positive energy to heal the party and the bone golems were inside the area of effect.
Bone golems have the special descriptor that magical effects that heal living creatures slow them for 1d4 rounds.
Our Gm determined that I would have to choose to target them to affect them or heal the party.
I think it would both heal the party and slow the bone golems. as choosing to harm undead would not do anything as it does not heal living creatures.
what do you guys think?