Chaosmancer
Legend
OK so I think I get most of it. The issues they seem to be trying to fix are:
- people having line of sight automatically breaking stealth/invisible/hidden condition
- making noise while cloaked by invisibility spell does not mean enemies know which square you are in.
I'm fine using Common sense and just because you CAN hear or potentially see someone, doesn't mean you do. I'm accidentally stealthy and I'm always giving people a fright despite being in plain sight.
Mechanically though I'm still not sure I get it.
Rogue spies a ruffian in plain sight but ducks behind corner of the wall. Rolls 18 to hide and now has the invisible condition. The ruffian didn't see them.
Dm Decides ruffian is bored.
So, mechanically, is the ruffian not actively searching? Ruffian doesn't know rogue is there so has no reason to search actively for the rogue, so is he using his action for passive perception? If it's free, is he effectively holding his action until something happens? So a distraction causes him to use his reaction and held action, freeing up the rogue to sneak past? Or was he making an active check with disadvantage for being bored?
Does sneaking past count as initiating the encounter so the rogue goes first? If the ruffians passive perception is high enough to detect the Rogue's attempt to pass then what? Roll for initiative? At what point? When the Rogue's action is over, so stealth grants invisibility to the end of the Rogue's turn?
I think I'd prefer it if passive perception was not usable to detect someone using stealth but if they get one free round maybe it will work. I would just blag it but it would be nice to have some step by step examples.
If the DM decides the Ruffian is not taking the search action, then it would be passive instead of rolling a d20. This is also why the DC 15 is there, to give a baseline for when you don't want the target to roll.
I don't know why the ruffian's reaction or action matter here, what matters is what the rogue is doing next. If the rogue just wants to slip past the ruffian, then unless the ruffian is standing in the doorway the rogue wants through the Rogue can dart from cover to cover and get past the Ruffian into the next area.
If the Ruffian has a high enough passive to spot the rogue, well, Surprise and/or initiative might be appropriate, but it depends. IF the rogue decides to tell the Ruffian he has a message for the boss, and deceptions his way past, there would be no need for initiative. If he wants to just stab the guy, initiative. You haven't entered into turns yet, so no one has taken any turns or actions in the turn order yet. Initiative would determine what was happening next, but I would not give the rogue surprise or the invisible condition, because combat is starting due to them being spotted.