There's some feat that makes you invisible to mindless undead, but after typing that I think it might be a vile feat, which might not be up your alley. Also if you do Hide from Undead you can look in to getting a Rod of Animated Dead DR 331 pg66, and just summon some undead to Rebuke.
You must be thinking of lich loved out of Book of Vile Darkness. It's part of a feat tree that has an evil requirement so that won't fly.
In related news I've discovered that clerics don't need to actually worship a deity but can choose their domains based upon alignment. You learn the darnedest things reading the PHB! I still couldn't find the mechanic by which a cleric chooses them though or what alignment qualifies for what domains. Both the deathbound and undeath domain look good and the magic domain is a requirement for entrance to dweomerkeeper so that's a no brainer.
Something else that's been puzzling me. Dweomerkeeper has a requirement of eight ranks in spellcraft and knowledge: arcana. Does anyone know a manner of getting eight ranks for entrance to dweomerkeeper by fifth level? The direction this character is going at the moment is ideally:
-cloistered cleric 4/dweomerkeeper 10/contemplative 6. This would be kind of tight on feats as dweomerkeeper requires a metamagic and an item creation feat. Another question is whether or not casting from a arcane scroll using the magic domain would satisfy the arcane caster requirement. Hmm. Every answer just leads to more questions.
-Or do you think I'd be better going cleric 3/necromancer 1/dweomerkeeper 10/contemplative 6? The problem with this is that it loses a significant amount of xp to multi classing.
Thanks for reading (and putting up with my indecisiveness) and have a bearded day.