Arcane Focus Gem

When wielded, this gem grants additional
spell slots—one additional spell slot for each
spell level the sorcerer can cast—and increases
the wielder's spell attack bonus and spell save
DC by +1 for spells cast while holding it.
Additionally, it allows the sorcerer to reroll
any {1}s when rolling dice to determine spell
damage.
This shimmering gemstone enhances the wielder's
focus and precision in spellcasting.