Class, Magic, and Spellcasting in universe

If the Myrrh is the lifeblood of the crystal, then Magicite is the breath of the world itself.

A small orb able to fit in pouches, Magicite is what allows you, the caravanner, to shape that raw, primal energy into something useful. Can be consumed to restore all spell slots for casters.
For non-spellcasters, finding an orb of magicite might allow that user to use otherwise untappable energies. Like a Clavat fighter finding a Cure Magicite, allowing a usage to heal his wounds in combat.

If you and your companion both cast "Fire" at the same spot, the two focused concepts of fire merge in the area of your choosing, amplifying into the powerful, wide-reaching spell, "Fire Ra." or "Spell name + Ra" Magicite is the medium that turns mere willpower into weaponized mystical energy. Combined magic express more powerful effects, such as additional damage die or area of effect.