This mansion is engulfed by terrain and has a stronghold underneath it
-5361535356384555496
seed
JAVA
1.16.5
version
Original author: BigBrain5Head
Link: https://reddit.com//r/minecraftseeds/comments/lbn9w3/this_mansion_is_engulfed_by_terrain_and_has_a
Comment: Java 1.16 to 1.17 snapshot
Seed: -5361535356384555496
Coordinates: -970 -1120