"Wait, that didn't work right" - the Dysfunctional Rules Collection

[Claudius Maximus]

(*Provided one accepts Complete Warrior and Complete Arcane's "if you no longer meet the requirements of a PrC you lose access to its class abilities" rule extends to other Prestige Classes.)

But it's generally accepted that those only apply to the books in question.

There's the old "Heal by Drowning" trick, that needs no further explanation.

Empty flasks weigh more than full flasks of Alchemists's Fire, Holy Water, etc.

The good-only Healer class has an [evil] spell (Deathwatch) on their list. I can't check right now, but I think they can't even cast it.

Undead are completely fine on the Positive Energy Plane, since they are technically immune to the negative effects of the plane. They're probably better off than living things even.