My players like to turtle in corridors, fighting enemies in sight before heading into the room. This often means the Defender is on the door, followed by several ranged characters. This also means the warlock isn't always looking at the whole room while cursing people.
Now, a Warlock's Curse can only be cast on the nearest enemy, and needs LoS.
There are two enemies in the room. NearNuisance is near to the wall where the door opens, out of sight of the warlock. FarawayFool is at the opposite side, fully in sight and farther than the first one no matter how you want to count distances (shortest path around walls or as the bird flies).
For simplicity's sake, let's say no hiding is involved and nobody is cursed yet. Walls block line of sight as well as line of effect.
The warlock player would want to curse someone. NN is Out of Sight. FF is not the nearest.
...but he's the nearest he can see / he's aware of.
I'd like to know what happens, by the rules, in these cases.
- Nobody has ever had line of sight on the nearest enemy. Yet the encounter was "activated" and everybody knows everybody's position (since NN is not hiding).
- Another PC has LoS on NN and tells the warlock there is an enemy.
- Another PC has LoS on NN and tells the warlock the position of NN.
- Another PC has LoS on NN but nobody tells the warlock (is this bad metagaming?).
- NN was in sight of the warlock, then dashed out of sight of everyone before the warlock could act.
- NN was in sight of the warlock, then dashed out of his sight. Somebody still sees it and tells the warlock where NN is.
- NN was in sight of the warlock, then dashed out of his sight. Somebody still sees it and stays silent.
I'm also interested in knowing in which cases we fall in (2 or 3? 5 or 6?) if the warlock makes a perception check and notices the presence of the enmy itslef. Does it also know the position? Can he choose not to roll the check to avoid knowing?