2007 · Kaynak kitap (oyunu geliştirmek için kurallar/seçenekler)

Blackdyrge's Bestiary I: Terrors of the Under Realm

This 30-page d20 supplement presents a collection of dangerous creatures from the Under Realm, including a bloodthirsty insectoid marauder, venomous troglodyte, undead choker, earth mephit, dragon-blooded behir, and enormous otyugh. Each entry includes a new-format stat block, background, tactics, treasure, and lair information. The supplement also introduces the venomous creature template, the writher and rotwasp swarm, and Stonespite, an intelligent evil warhammer that can petrify its victims.