Ahead lies...?

[Anastasia]

You look back. Sure enough, on the last full moon, a hazy, silvery portal did appear.

[Nephrite]

Did anyone come in or go out of it?

[Anastasia]

No.

[Nephrite]

"...Huh. Last full moon, a portal did indeed open here." Moore says. "I don't know where it went to, but it happened."

Can I extrapolate when the next full moon will be, based on that?

[Anastasia]

Assuming similar lunar patterns to a normal Prime world, about a week.

"I would suggest an augury or similar spell," Xandra speaks up here, "Unless we wish to sit idle for a week's time."

[Nephrite]

"Well, I had intended to do other things in that time." Moore says. "But... well, I don't think it's unreasonable for us to ask if this goes to where we want it to."

With that said, Moore prepares for a divination!

As per the spell.

'Will this portal lead us to the Greenwood that we seek?'

[Anastasia]

Remember, useful advice about a subject, not precise questions. If you want commune for questions answered more directly.

[Nephrite]

I would argue the wording of the spell, 'useful piece of advice in reply to a question concerning a specific goal, event, or activity that is to occur within one week' would apply here.

I could rephrase it to say 'What will happen if we pass through the portal here,' if you'd rather.

[Anastasia]

That works.

The answer is, 'You shall find the silver path.'

[Nephrite]

Hm.

"'You shall find the silver path.'" Moore says to the others.

Does that ring a 'This is probably the gates of the moon' for him?

[Anastasia]

Your knowledge would say it leans that way.

"That could be the moon, but is inconclusive," Cresiel concludes, "Vexing."

[Nephrite]

"Well, let's remember this location." Moore says. "I think it's worth looking for other places. Maybe... mm. Maybe we should just use our embassies for information on this, rather than trying to brute force it with luck."

[Anastasia]

"If we're going that route, can we contact the master of the demiplane directly?" Kaja asks, "If we have the means, why not?"

"Better than wandering the forest?" Cresiel asks, calm.

"Better than wandering the forest. I'm not a green." Kaja seconds.

[Nephrite]

"Well, we don't know who it is, but... surely, someone would be privy to that information." Moore says. "Let's go that route."

Would those embassies be ON Arborea, or would they be on Celestia?

[Anastasia]

Both. Pick your poison.