From publisher blurb: “We’ve had several skirmishes with the beast. It’s impossible to tell how badly we’ve damaged it before it retreats back into that damnable howling storm, but we lost Frederick and all hopes for healing with him last night. We’ll be approaching the keep soon, and I know it will be waiting for us there. I pray the gods are still on our side.” - From the recovered journal of Revlin Marhill. The xarlphus is an ancient aeonian creature who roamed the continent long before the rise of the humanoids who rule its realms today. Its massive twenty-six-foot long frame and control of icy gales would be enough to strike terror into the heart of any unfortunate adventurer who crossed its path, but the xarlphus has much more than its titan-like strength and wintry magic to fear. Beneath its gleaming crystalline horns is a mind so dangerously cunning and tactical that it rarely needs to use its supernatural gifts to defeat its foes. This supplement includes: Lore and statistics on the cold and calculating xarlphus and their new creature type, Aeonians. A deep dive into their hatred of heroes. Plot hooks to get your party of adventurers involved with this CR 18 creature.