Where do I find out how to reach the Realm of the Dead?

Hint 1 of 4:

You first need to find the Druids.

Hint 2 of 4:

All foreigners will be sacrificed, so you must survive the sacrifice before
you can talk to anyone on this isle.

Hint 3 of 4:

You will then automatically talk to the Arch Druid to find out what you need
to do.