Sora stands and moves to a space where everyone can gather. As she waits on the others she takes a final look at the map, for both the teleport destination and the direction to the tunnel entrance from there based on any landmarks.

"When we get close to the mine entrance I have a summon spell that takes a few minutes to cast, but will be most helpful underground."

She casts a few spells on herself, one of which may be surprising for those expert in identifying spells. Once everyone is ready Sora casts Greater Teleport for the group.

Spoiler: OOC
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Good thing Hillock doesn't count as natural size here (I hope...)

Casting:
Protection from Arrows (19 hours)
Moment of Prescience (19 hours)
Split Ray Disintegrate (SL9) seemingly on herself even though there are no rays shot, but is the setup for her Retributive Spell.

Greater Teleport with the whole party to the designated arrival spot.