Dex's Time in a Bottle

When you cast this spell, you are transported, along with any other materials you are wearing or carrying, to a ship on an ocean with a non-hostile crew chosen by the DM. The bottle's contents exist within a semi-demiplane of the world in which you cast the spell.

You continue to hold the bottle used in casting the spell, and yet you can also see it above you and on the horizon. If you stare into the bottle, you can see a tiny copy of the ship in a large ocean, and possibly see yourself staring into an even tinier bottle. If you watch the miniature you in the smaller bottle, you see it performing whatever actions you perform, delayed by the barest instant.

For every minute which passes in the outside world, one hour passes inside the bottle. On deck, you hear Jim Croce singing a love ballad faintly in the distance.

If either the outside or inside bottles are broken, all the bottles break, and the spell ends. Even if the bottles are not broken, after one minute elapses in the outside world, the spell ends. However it happens, when the spell ends, you must succeed on a DC 20 constitution save or take a level of exhaustion.  The duration of spells cast inside the bottle is measured in time outside the bottle. You are not subject to constitution saves for time spent awake inside the bottle.

At higher levels. When cast at 7th level, you can have one willing creature accompany you, and you are able to concentrate for 3 minutes (3 hours inside); at 8th level, up to two willing companions for 9 minutes (9 hours inside), and at 9th level, up to 3 willing companions for 27 minutes (27 hours inside).