/
The entire structure is surrounded by terrain but some caves can tunnel themself through that and the structure, just like in vanilla
Sometimes they have the infected effect spawning silverfishes when hit
2 Silverfish spawner, 2 library eye chests, 1 lodestone in the floor and a portal frame with an 10% chance to have an eye of ender
Eyetrims have a very low chance of appearing in the chests but in the portal chamber they are guaranteed to appear
Starting point of the structure

Server and low end PC friendly version of DnT Stronghold Overhaul