I'm running a campaign that the players are about to encounter several burrowing creatures. The creatures in question do have Tremorsense so they'll be able to tell where the players are and with good burrowing speed should be capable of ambushing them. I'm just curious about two things:
- Can I roll Stealth (or do I even need to) to have them hidden underground before jumping out and attacking. Hopefully causing players to be surprised.
- Since they are entirely hidden beneath the ground, does that mean their first strike burrowing out of the ground counts as hidden and gives them advantage?