OD&D Using magic to help build an undispellable castle

[el-remmen]

I don’t have specific advice but I’d love to hear everything about your B/X campaign, @Ciaran!

 

[Brendan Byrd]

Hi folks! Got a thing coming up in my B/X campaign and wanted to see how to make what I have in mind fit the overall framework of the rules.

One of the PCs is an 8th level fighter who's been given a knighthood and command of a small border keep near the tentpole megadungeon. Because of ongoing troubles with a couple of rogue devils building small armies and a broader desire to reassert control of the region after various wars, the local magocracy wants to expand his keep into a castle. (Also, the PC will soon hit level 9 and gain a castle according to the rulebook.

An idea to consider:
If the local magocracy has an interest in the site and its expansion: set aside strategic places for visiting NPC mages to pop up their Daerin’s Instant Fortress(es) ???
[1e DMG, pg. 142; 2e, 3e]

 

[GMMichael]

But building a stone castle takes several years, and there's no time for that either in or out of character.

Unseen servant + haste. Give it a belt of ogre strength if necessary.

Or find a band of dwarves and promise them their own tavern.