Doomraga's Revenge (Merlin Series #7)

Basil becomes Merlin's partner as they battle the mysterious shadows that threaten the new Avalon. A dark magic has been spreading across Avalon. Initially, the events seemed unrelated: a war in Fireroot between the dwarves and the fire dragons, blight in Stoneroot, and disputes throughout the realms. But as Merlin and Basil scour the realms, they begin to realize that looming behind the growing chaos is a single dark threat—an enemy that they’ve never encountered. One that must be stopped ...