Abot Druids and undead...

[Stalker0]

Looking back at the ph, I have to change my opinion. It specifically mentions the hurting of undead under the cure spells and even heal. So I agree with the others that you can't use regenerate to hurt undead- since it doesn't mention undead in the description.

 

[Saint Brendan]

This will NOT work

the Regenerate Light Wounds, etc. spells have:

"Target: Living Creature touched"

so undead cannot be targetted with these spells anyways.