Respen Acts...
~ This is the way. ~
Respen, clearly excited at the prospect of travelling magically, says, "Then the mirror is what we shall do. We should bring our horses to Margull's. If I may be so bold, perhaps one of Dewydd's retainers can return them to Moseby Manor, or perhaps they can remain at Margull's, if he has stables. I didn't see them when I was there earlier because I wasn't paying attention.
Either way, we need our gear, so we should walk into the mirror with as much as we can, and then drop the heaviest gear on the spot should we be so inclined. It will mark the location of the portal.
As to the command word, perhaps we can rely on Vega. He left it in her care, and it appears that she is capable of using it, even if she isn't fully aware of what it does. I think we can bootstrap this such that it will be effective for our purposes."
He leads his horse purposefully back to Margull's, unpacks the relevant tools and gear, and re-enters the building, acknowledging the perplexed looks on the guards' faces. He moves up the stairs and into Margull's "inner sanctum".
"Vega, we are back. We have an idea." Respen explains the goal: scry reconnaissance and infiltration of Skorane using his anecdotal knowledge of how the mirror works, any abilities or knowledge of all of the party members, as well as her extraordinary gifts with magic devices, and exfiltration of the same with her guarding the portal.
He finds the relevant tomes and maps among Margull's things, and he sets about inspecting the mirror without touching it just yet. Respen records any markings on the mirror that point to where Margull went, writing them down on parchment, and then he attempts to decipher the same for Skorane. He peppers Vega with questions about what instructions Margull may have verbally left with her about the mirror or the crystal orb.