One of them jogs over and steps onto your wagon. "We are arriving at the north ravine of plateau 13 in about two hours. The chief wanted me to ask if you'd be willing to join the scouting party to find a good place to set up camp in the tunnels?"

Did she mention her heightened senses to the chief? She doesn't think so, but it seems reasonably likely that word has gotten around?

She does want to earn her keep, but is worried about which "all sorts of creatures" she'll find in "the tunnels".

"What would that entail?"

"Oh, just heading into the tunnels with a group and finding a reasonable place to set up our tents. Making sure we have access to water and whatnot. Your group would have yourself, two members of the Apex and Seren."

The Apex being the group of warriors with powers that Seren mentioned.

"When people in scouting parties die, what tends to be what killed them?"

"We haven't had anyone in a scouting party die in at least a couple years. Sometimes they get some scrapes but generally those gets healed by one of our priestesses." 

Scrapes from spelunking? Seems safe enough.

"I'd be happy to help."

"Awesome!" 

He flashes Owl a smile

"I'll come find you when we stop, also Seren was looking for you."

He hops down and runs to the next wagon.

She has a mask for the sand, but what Owl would really like are goggles.

She's going to close her eyes and spend some charge to see through her eyelids as she looks for Seren. 

Seren has stepped off of her wagon and is waiting for your wagon to arrive at her location.

"I heard you were looking for me?"

She's going to explore alien caves on another planet instead of going to school with people who actually want her around and asked for her in particular; today is a pretty good day.

"Yeah! I found out what a couple other abilities of mine do during the night. Also if you'd like to take another crack at the shield you can.

"What do you expect to go differently compared to the last time I threw a rock at your shield?"

"Well I was hoping to find if there was an upper limit to the force it could take"

Is it possible for Seren to position herself or the disk such that a blow to it won't carry through and hit her? Also, such that a glancing shot won't be redirected into her?

It appears that wherever Seren moves the disk, its new position ends up being directly in the line of sight between herself and not herself. If she has it in front of her right shoulder perhaps Owl could stand on Seren's left side? That might allow Owl to deal the disk a glancing blow.

What's Seren's idea for safely testing whether the disk has an upper limit to how much force it can take?

Decide on a starting point and scale up from there every 10 minutes.

What happens if the shield has an upper limit and then the attack gets through and it breaks her bone?

Probably don't increase the force by bone breaking amounts?

Seren is under the assumption that the force the shield blocks will be subtracted from force of the punch.

Owl too favors the hypothesis that the force of the shield will be subtracted from the force of the hit even in such a case as the shield cannot block the attack and allows it to pass through.

She was not, however, under the assumption.

Worst case scenario: Seren can heal her broken bone.

We still haven't tested whether her healing power works on bones.

She is fairly confident it would and is willing to bet a broken arm on it.

"What makes you so confident?"

"Just the experience of seeing someone's flesh knit itself back together. The way it affected every layer of muscle and skin makes me believe it would affect bone as well."

She would rather set the bone before healing it, just to be safe.