Originally Posted by
illyahr
Well let's start with the Corrupted template from the Book of Vile Darkness. Boosts to Str and Con with minor penalties to Dex, Wis, and Cha. Boost to natural armor, scaling DR with HD, damage dice of natural attacks increases one size with partial vile damage, fast healing, increased DC for special attacks. All with scaling CR from +1-3 based off of HD.
All with no listed Level Adjustment. Not LA: -, it doesn't even have a Level Adjustment entry.