Zardnaar
Legend
There's also a battery in the Netheril's Fall book that can recharge wands. lots of potential. I'm not sure if it works with that swapping feature : "While holding the battery, you can take a Magic action to touch the battery to one magic item. If that magic item normally regains expended charges daily, it immediately regains 1d4 + 1 expended charges, and the battery loses its magic."
Only problem is squishy
Do wands count as wondrous items? For the level 14 ability.