Twisted Final Fights

From publisher blurb:

Twisted Final Fights is a supplement for Four Against Darkness bringing variety to Final Boss encounters.

Using a d100 table, you will encounter frightening Final Bosses such as the Bewitched Armor, the Baalran Scourgemaster, the Ettin Adventurer, Akerbeltz’ Bellbringer, the Mutant Houndling, the Abyssal Eye-Maw, the Three-eyed Mutant, the Lich Sigilist, the Corrupted Swamp Elemental, and many more… Features:

48 Final Bosses that scale up with the power of your party;

A d66 Table for Weird Treasure;

Rules for the Enchanted Homunculus, a weird creature that can join your party after you collect enough pieces to build it.