Valheim

The swamps that have the Bomemass altar usually (but not always) have a lot of crypts. On a new run, I'll usually try to find a crypt that's right on the waterline somewhere so I can get in and out with a little less risk and hope it has a location stone for the boss. Once I find the boss location, I'll make a longship out of my first crypt iron and hopefully a shield and head to the boss marker and see if I've got a good collection of crypts to work with. Finding the boss marker can be trouble sometimes, so I also keep an eye out for it up in the ruined towers as I'm sailing and mapping swamp coast line.