Originally posted by pipo.p:

Don't worry about that. If burrial chambers are in number in a area, surtling cores will come in plenty. There are often more of them in the backroom behind a spawner. The difficulty is then to loot this room without destroying the spawner, should you have an interest into not destroying this spawner (e.g. an easy spot to farm bones, because spawning rate and levels look low).

? Did I miss some use of bones that was added? Or are you being funny? I think I have 2 chests (the big darkwood ones) full and stopped picking them up, but I am just coming back after a break..