"Jermsy had better not find that glaive..." Halla mutters.
"Or better yet, maybe he will find it. Save me some trouble..." That line of thought trails off as the druid throws herself into spellcasting. A minute later, each member of the group becomes wind and mist.
[ +- ] Wind Walk
You and up to ten willing creatures you can see within range assume a gaseous form for the duration, appearing as wisps of cloud. While in this cloud form, a creature has a flying speed of 300 feet and has resistance to damage from nonmagical weapons. The only actions a creature can take in this form are the Dash action or to revert to its normal form. Reverting takes 1 minute, during which time a creature is incapacitated and can't move. Until the spell ends, a creature can revert to cloud form, which also requires the 1-minute transformation.
If a creature is in cloud form and flying when the effect ends, the creature descends 60 feet per round for 1 minute until it lands, which it does safely. If it can't land after 1 minute, the creature falls the remaining distance.
Halla leads the way upward and away from the branch. As they drift farther from their branch, the silvery void seems to press in closer and closer, obscuring the view of Yggdrasil.
OOC:
This part is tricky, but making an arcana check could give you some clues!
