Pointing out an unseen creature to team mates

[Santobon]

Context: My players will be facing off against an enemy who has Greater invisibility.
Only one of them is a spell caster and has the spell: See Invisibility. So far they are the only one who would be able to see them.

How would I handle if only one person can see an invisible creature and tries to point out their position to the party. Like “Hey, he is right there!” Like what type of action would it take to do that? Would I have them do a check? What DC? And how big of a bonus would I grant the players for trying to do a Notice Check?

I was thinking...Ask them to do a swift action-> to do a Physical Science check (Cause physical science covers the sciences. Which can deal with math and distance.) with a +2. Still figuring out what the DC would be.

Now they could do the same "Aid" check as a Standard action to grant the Party a +6

Cause I see as a swift action you are quickly trying to say "Over there." Where's with a standard Action. Your spending more time to better articulate the position of the enemy.

[Kishmo]

There's nothing wrong with that you've put together here, but, you can also check out the rules on senses & the "four states of awareness."
If someone in your party knows that there's an invisible critter is around, but doesn't now what square(s) the critter's in, they're "aware of presence" but not "aware of location" or "observing." Your spellcaster with See Invisibility is Observing, though. I'd say that the spellcaster could say "it's right there, shoot it!" as a free action to make the other party members Aware of Location but still not Observing (i.e. they could attack the invisible thingy, but it still has total concealment = a 50% miss chance.)

Alternatively, party members can try and locate Invisible things themselves with a Perception check opposed by the creature's Stealth check - in Starfinder, a stationary unseen creature has a +40 bonus to Stealth checks, but this bonus is reduced to +20 if the unseen creature moves (and these bonuses are negated for potential observers with blindsense.)

[BigNorseWolf]

Talking is generally a free action, and assuming they have the levels to fight this thing, one party member could shouut " 3 o clock 15 feet" which should give a close enough location to attack the square they're in with a 50 50 miss chance.

Rules wise invisibility is overwhelmingly harsh, especially to ranged combat (you should if anything be able to attack a line with a missile weapon, or a 3 square sweep with a greatsword or something)

When I was a kid and we were screwing around hitting each other with sticks, I was rather good at it, but the blindfold made people NO harder to find, like, at all, it just made them harder to hit because i couldn't see their parries and harder to block because I couldn't see their attacks.

[Santobon]

All good points.

I completely forgot about the Four States of Awareness. I'll probably do what you guys recommended. Let it be a free action, aka banter, for them to point the enemy out. The thing would still have total concealment. But at least they have a chance to hit the thing.

In the interest of fairness. I'll drop hints to the players that this enemy can become invisible. Early enough so they can get a level up, so maybe 3 to 4 sessions, before meeting the BBEG. That way, they have enough time to plan to do something.

[Xenocrat]

Time to throw out some level 1 flour grenades.

[Kishmo]

Xenocrat wrote:

Time to throw out some level 1 flour grenades.

Or, even better: magical laser-attracting level 1 flour grenades :D