3.5’s Demilich has the ability Phylactery Transference:
Headbands, belts, rings, cloaks, and other wearable items kept in close association with the demilich’s phylactery transfer all their benefits to the demilich no matter how far apart the demilich and the phylactery are located. The standard limits on types of items utilized simultaneously still apply.
I have a wizard demilich that has an extremely well-guarded phylactery way over that-a-way, and part of the phylactery’s protection involves the lich simply not visiting it any more than absolutely necessary, lest some freak combination of bad timing and a divination spell reveal its location or defenses.
However, the lich still wants to be able to use staves, scrolls, wands, and rods, and wants to study their spellbooks every night so they have their wizard spells available the next day. Ideally, they’d like to use the odd feather token or other one-shot wondrous item, with bonus points if they can access storage near their phylactery (eg., so their skull form can appear without any treasure, but can still pay for a night at an inn if they so choose).
They’re a 21st level wizard with 2 open non-epic feats and 500,000 gp to spend on magic items for this purpose. They do have Scribe Scroll and Craft Wondrous Item already, and crafting doesn’t cost XP (for the players, either). They also have an augmented Handy Haversack (with plenty of extra storage in the main area). They can also take levels in non-wizard classes, so long as all of those levels increase their wizard caster level (eg., taking levels of Loremaster is acceptable, but Eldrich Knight is out).
I’m looking for a RAW-compatible option for this recurring villain to have access to their non-wearable stuff while keeping it away from the players for now. If the PCs find the lich’s stash, which will include a journal functionally detailing their character sheet, the full ability of the lich to stay away from their phylactery for years on end must make sense. Whether the PCs can use any of the gear in the stash to have similar remote access is irrelevant (my presumption is that they wouldn’t, because Phylactery Transference will be key to the whole thing working, but if it works for them, great!).
So, short of GM Fiat, how can my floating skull swap between staves?