Unfortunately, multiple settlements in the province of Yvresse are controlled by the Skull Crag Greenskin tribe. He does, however, have another settlement, Tor Yvresse, on Ulthuan (which is also where his Loremaster of Hoeth hero, Cavill, is located). He’s also surrounded by Orc factions such as the Top Knotz, Teef Snatchaz, and The Bloody Handz. If you’re playing a Mortal Empires campaign, Eltharion’s main army starts in the Southern Badlands province controlling the Gronti Mingol settlement. In the Eye of the Vortex campaign, Eltharion starts in the Northern Yvresse province of Ulthuan.
The campaign maps and Eltharion’s skills infographic (discussed shortly) come from Total War: Warhammer II‘s official website.
Total War: Warhammer II – Eltharion the Grim’s campaign basics Vortex campaign victory conditions