Filled with the magic of the Waaagh!, the Wurrgog Prophets are powerful wizards and the unchallenged leaders of the Bonesplitter warclans. Behind their baleful masks, they radiate the potent aura of Gorkamorka, filling their opponents with dread and driving their mobs into even greater heights of frenzySource: ageofsigmar.fandom.com
The Jokaero are an intelligent alien species who resemble the orange-furred great apes of Old Earth known as orangutans. Though lacking any known form of language, they are capable of tremendous feats of technological construction and manipulation, and specialise in the development of weapons technology, particularly miniaturised weapons.
Rogue Psykers are Human Psykers that now belong to the Forces of Chaos.Source: Lexicanum
Many have eluded either the Inquisition‘s Ordo Hereticus or the Adeptus Astra Telepathica‘s League of Black Ships and have become tainted by the Gods of Chaos, a process which drives the psyker completely insane. Their powers are completely out of control, capable of causing mass destruction but also making the psyker himself prone to possession by Daemons.