The Road of Skulls is a Frozen province introduced in Total War: Warhammer II.
In Total War: Warhammer II, this province was previously 100% controlled by Har Ganeth at the start of a campaign. The Resurgent Update made Har Ganeth playable, and changed who controlled which settlements.
The Road of Skulls leads to Har Ganeth, the centre of Khaine worship in the Dark Elven empire. Ruled with an iron fist by Crone Hellebron, this is the only Dark Elven city where murder is outlawed for most of the year - the only blood spilt is done so in the name of Khaine, and sacrifice at his altar is the penalty for breaking this or indeed any law. Only on Death Night, when slaves and prisoners are let loose onto the streets, is the law lifted, and blood and wine flow equally as freely in a city-wide orgy of cruelty.
Har Ganeth is relatively isolated, reflecting the fact that it was originally built by Druchii generals after their defeat at the Battle of the Blighted Isle, refusing to go back to Naggarond so fearful were they of Malekith's wrath. It is an area particularly rich in chaotic influence - the Black Pillar is a towering shrine to the Chaos gods carved from obsidian and studded with the skulls of sacrifices. Sometimes it can be difficult to tell where the Khaine worship ends and the Khorne worship begins...
Frozen Sea · Kraken Sea · Northern Sea of Chaos · Gulf of Kislev · Sea of Claws · Southern Sea of Chaos · The Albion Channel · The Great Ocean · The Shard Coast · Sea of Chill · Sea of Malice · The Forbidding Coast · Sunken Lands · The Isles · The Mistnar Crossing · The Bleak Sea · Straits of Fear · The Boiling Sea · Sea of Squalls · Sea of Serpents · Straits of Lothern · Scorpion Coast · Tarantula Coast · The Vampire Coast · The Turtle Shallows · The Far Sea · Worm Coast · Mangrove Coast · The Lustria Strait · Daemon's Landing · The Churning Gulf · The Southern Straits · Gulf of Medes · Shark Straits · The Pirate Coast · The Black Gulf · Tilean Sea · The Estalia Coastline · Middle Sea · Serpent Coast · The Daemonium Coast · Shifting Mangrove Coastline · The Eastern Isles · The Sea of Dread · Eastern Sea of Dread · The Jade Sea · Lizard Sea · Sea of Storms · Straits of Nagash · The Bitter Sea · Northern Straits of the Jade Sea · The Inner Sea · Straits of Chaos