(Sheesh how many 1s ans 6's can you roll at one time?)

Sabastian perception: 19

(To DM: Does there appear to be enough bush and/or rock cover in the field to get up to the base of the tower where the look out is? And how far away are we from the tower with an occupant?)

Biggz, for all of his apparently indolence up to the current day, appeared to focus up sharply as soon as the threat made itself known. Although too focused at the time to acknowledge any words or concern in a look or gesture, his ears twitched now and then from apparent attentiveness. His eyes however stayed glue searching the terrain for any bits of at least some measure of cover before getting any ideas.

"Hm... looks.. pretty open... sort of.." He mutters just loud enough for the group to overhear. "I still have that one trick for making someone... mn... unseeable for a bit. So long as they don't try to shoot'im." 

Kala walks of the road and joins you behind the bushes, but because she is still standing, her hear still sticks out. Luckily so far the guard seams to be watching someting in the south, away from you and  it looks as if he didn’t notice her yet.

1 2 (roll me one more stealth)

The guard starts to move around.

The area is mostly open plain, there are some bushes here and there and the grass is high enough in most places to hide a careful small creature. For someone as large as a bugbear, not so much.

Kala, third time's a charm, stealth: 6

Dain stealth: 18

(To Dm: Figured but had to ask.)

Mr. Biggz Stealth: 5.

(The stealth roll was just for Kala.)

Kala finally crouches down a little and waits.

2 The guard keeps on moveing and looks westward now.

Stealth 18

As long as you don’t move you do not need to reroll stealth. Also the guard tower is around 300 ft away.

Otrov

The halfling moves her little body back carefully to the rest of the group, whispering, "Want me to get a closer look?"

"Do you think you can do so without being seen?" Dain asks as he lays in the dirt.

Margret looks at the situation whispering "I really don't like this!" she looks for the suns position 

"Perhaps we could come back later? Or approach with the sun at our backs"

(To Dm: Ah, my bad then. More than happy to ignore that nat1!)

"Well, it's like I said. I do have a trick to make her unseen for a bit, so long as I can focus on it. But that's all up to the rest of you." Mr. Biggz says, barely hidden behind his current set of cover. "Best decide soon though before that watchman finally spots us." He suggests. "I'd say its worth a shot, but... you lot know each other far better than I do."

Margret says "Tell her how long you can do this what she can and cannot do to keep invisible It seems the only option."

She nods to Otrov.

"Scout first if you think you can kill the sentry  Without alerting the rest use your judgement"

Otrov

The halfling can barely keep her excitement contained as she hears the word "invisible."  She whispers to Biggz, "What?! Really?!  You mean they won't see me?  Will YOU see me?!  How does it work?  Oh my gosh oh my gosh oh my gosh!  What does it feel like?! Is it like walking in water?  Does it hurt?  Does it smell?    How long does it last?  What am I supposed to do again?  Oh right, the orc guard.  It seems pretty hard to get to him if he's way up there [DM how high vertically is the orc?] but at least I could get closer!  Okay, okay, okay," she shakes her head and sighs.  "I'm ready."

The Bugbear lazily nodded to Margret. But, just as soon as the halfling began rattling off again, Biggz unhesitatingly laid down on his side, keeping his head propped up with a fist to the cheek. "Oh? Well, that was faster than usual." He jests and smirked at Otrov. "Just keep three things in mind, and you aughta be alright. One, if'n yer aiming to harm something directly, that'll end the trick on its own. Two, ya got maybe.... something over thirty minutes with it. Perhaps a bit longer, but I usually don't use it for longer personally, so..." Biggz shrugs as much as his current positioned allowed it.

"And three, ain't noone seeing ya so long as the trick remains, but that stay quiet and try not to disturb anything that'll leave tracks. And uh... yea, that's pretty much it... Oh wait, uh... make sure to do what she said and scout out the shrine before ya try offing anyone, aight?" He asked. Once he had her agreement, Biggz waves her over just so that he can lazily make the motion of knight her with his axe. "Now they see you, and now, they, don't." The moment the last words leave his mouth, Otrov first turned suddenly transported, and then faded from view altogether.

Margret smiles looks with thought studying how the bugbear casts the spell "Remember Otrov. Just cause they cant see you doesn't mean they cant hear you, My bat sees invisible things by sending its own high pitched sounds and listening for the echo. And as far as sight goes parting grass while traveling thru it could give you away."

When Otrov says something about how high up the orc is.

"It had to get up there. Look for how it did. If you got a mirror signal us after you kill it, if you can." 

Otrov 

Waiting expectantly for it to take place, she looks down at her body, whispering, “Hey!  Heeeey!  Can you see me?” Otrov makes a rude gesture toward everyone and waits for a reaction. When nothing happens she smiles.  Viper, she thinks slyly. 

“Okay, I don’t have a mirror or anything but I’ll figure out a way to signal you that the coast is clear.”

Otrov walks on the clearer path, thinking that would stand a good chance of not disturbing bushes or anything and goes towards the tower looking for guards and entrances...

• There is actually a mirror included in the thieftools set
• the tower isn’t high, it used to be a shrine and not a fortress. He is at the second floor (ground=first), so his feet would be somewhere at around 10ft plus 3 ft wall that gives half cover.
• Otrov roll me a stealth check with advantage