Medivh, the last guardian of Azeroth, was trained to become the Guardian. He was, however, overcome with evil and stuff, decided to search out with his mind. He found another mind, that of Gul'dan, upon Draenor. So begun Warcraft: Orcs and Humans, where Medivh opens up a portal, letting the Orcs invade and help them to find the lost tomb of a demon lord, Sargeras, in exchange for defeating the only rival in terms of power. The kingdom of Azeroth. The humans, dwarves and elves form an alliance in the second game, Warcraft 2: Tides of Darkness. Orcs have taken over the western continent and now come for Azeroth. Medivh is killed in his tower by a party of humans. The humans defeat the orcs, and they return through the Black Portal to their own world. Those that remain are placed in internment camps. Warcraft 3: Reign of Chaos begins with Thrall, an orc warchief, having a vision of Medivh, telling him to flee to the lost continent of Kalimdor. Thrall does so, after meeting with "The Prophet" (Medivh) and Medivh continues to the council of Azeroth, where he appears in front of all the rulers of the humans telling them to also flee to Kalimdor, as rumours of a plague spread throughout the northlands. Medivh says he has failed humanity once before, and he will not do so again.