Undead Lord: My Territory Lies in Another Dimension

[Necromancer + tech tree + portable homeland + slow development + no saintly heroics + a moral code]

Thorne transmigrates to another world and becomes a necromancer.

On this continent, necromancers are universally despised, because once they get going, they become a nightmare capable of sweeping across the land.

But in the early stages, a necromancer can’t build a lair or afford to keep more than a few troops. A single adventuring party can wipe one out.

But Thorne gets hold of an Interdimensional Territory System.

His territory is hidden in a pocket dimension, so even if someone destroys his production line, he won’t be left without any troops to raise.

And the System can do more than that. Touch a corpse to turn it into energy, then convert that energy into corpses of different species. It’s incredibly convenient.

While his fellow necromancers fret over the shortage of human corpses, Thorne chops up slimes in a swamp and turns them into zombies, grinning like a factory owner on the verge of striking it rich.

After Thorne transforms into a lich, he stashes his phylactery in the pocket dimension, leaving himself without a single weakness.

Years later, when faced with an arrogant merman envoy from the sea, Thorne, now ruler of the whole continent, sits on his throne with a grave expression, thinking…

I’m getting a navy!