Deeppockets

Deeppockets was a spell that created extradimensional spaces within the pockets of a piece of clothing, enabling them to hold substantially more than they would normally be able to.

Effects
Upon casting the spell on a fine robe or gown containing at least a dozen hand-sized pockets, a chosen number between 10 and 100 of those pockets became capable of holding a combined weight of and a combined volume of, which added only  to the weight of the garment. The spell lasted for 12 hours, or longer for more powerful casters, after which all the contents of the pockets reappeared around the garment. The caster could also summon all the contents back by uttering a command word.

In the phlogiston, since access to extradimensional space was impossible, the objects contained within space created by deeppockets were inaccessible until the garment was brought inside a crystal sphere. The duration of the spell was also halted while in the phlogiston.

Components
The spell required verbal, somatic, and material components. The robe or gown needed to be worth at least 50 gp and a robe that contained the maximum number of pockets (100) was worth at least 200 gp. The materials required, in addition to the garment itself, were a small golden needle and a half-twisted strip of fine cloth tied at both ends.

History
The spell was attributed to the Netherese arcanist Undine in, and was originally called Undine's extra portal pocket.