Spell Channeling Items: A Basic Fantasy RPG Supplement

From the Introduction:

This supplement provides information for spell channeling items, a new type of magic item, under the Basic Fantasy
Role-Playing Game rule system.

Spell Channeling Items
Magical Spell Channeling Items are a different sort of magical item that allows a spell caster to convert the magical energies of currently memorized spells into another predetermined spell. For example, a Wand of Magic Missile Channeling would convert any other currently memorized first level spell into a Magic Missile spell cast as if the caster actually had that spell memorized instead.