Derro Slums — 28×22 Underdark Battlemap

Heyya folks,

I’ve got another map from the lower reaches of the Underdark, built around the idea of a derro settlement tucked into the base of a canyon beneath a duergar city. The structures are thrown together from scrap and broken stone, the ground scattered with cages, bones, and debris that speaks to how little the derro value anything around them. A foul pool simmers in one corner, and the raised ledges along the edges create natural vantage points for snipers or for anyone watching whatever chaos the derro stir up. Fungal growths and ritual fires give off the only light, so most of the space stays muted and grey.

The map was made with Laduguer’s Furrow in mind, but it works just as well for any subterranean canyon slum, a lawless shantytown, or a desperate settlement clinging to the edges of a hostile environment.

The layout is shaped by scrap structures, broken stone, and small elevation shifts that create the vibe derro are known for. It fits tense infiltration scenes, chaotic street fights, or roleplay encounters where the environment feels just as unstable as the derro themselves. I put together several variants as well. Lava, acid, and a fully flooded version each shift the tone in different ways.

If you want the full set of map formats, including high resolution, gridless, VTT ready, and all the variants, they’re up on my Patreon:

[https://patreon.com/dungeonmr](https://patreon.com/dungeonmr)

If this map fits your table, take a look at the rest of my work. I release new maps every week and keep a steady rotation of atmospheric variants.