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Message: <blockquote data-quote="Nevvur" data-source="post: 7404483" data-attributes="member: 6783882">Posting the relevant PHB text as a point of reference: [sblock]p.194-5 When you attack a target that you can't see, you have disadvantage on the attack roll. This is true whether you're guessing the target's location or you're targeting a creature you can hear but not see. If the target isn't in the location you targeted, you automatically miss, but the DM typically just says that the attack missed, not whether you guessed the target's location correctly. When a creature can't see you, you have advantage on attack rolls against it.If you are hidden - both unseen and unheard - when you make an attack, you give away your location when the attack hits or misses. [/sblock]The NPC has to guess where in the fog cloud you are. How this guessing happens is going to depend on the DM, so it's something to ask him/her. The big thing is that last line in the block above, about how making an attack reveals your location (it doesn't change the fact they can't see you, but you're no longer hidden). The DM may rule that other actions also reveal your location, like casting a spell with a verbal component. Same goes for creatures outside the fog and you targeting them.If I were your DM, my NPCs would generally prefer to attack something outside the fog cloud, unless there's a good reason to be going directly after you. I run combats on a grid, so guessing your location would be a 1 in 56 chance (56 squares occupied by a 20 foot radius sphere), assuming you didn't reveal it through some action. They're more likely to pull out melee weapons and charge in than guess your position.More broadly speaking, fog cloud isn't great against ranged weapon attacks unless the attackers all have advantage for some reason (e.g. kobold pack tactics + NPC allies in melee), but it's great against ranged spell attacks, because most of them require "a target you can see." They cannot target you even if they know your location.</blockquote>

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