In Moragne (a MRQII only setting), there's a ready answer for what this skill is, it's minor prayers to the Hidden God, or to various powerful spirits for some boon (it differs from divine magic in that divine magic can only be cast by ordained priests). But in most other settings, including the Dawnlands, this kind of specificity of domain is lacking. Magic in the Dawnlands is much more diffuse, much more worked into the ordinary world. This distinguishes it from the other kinds of magic you get, all of which have specific domains of knowledge and power represented by skills, which I am fine with.
So I decided to abolish the Common Magic skill and use the following house rules instead.
1) Character still learn Common Magic spells. Learning Common Magic spells is represented by learning sacred and esoteric lore related to some other skill.
2) Characters cast Common Magic spells by declaring they are doing so while making a skill check. They must provide an explanation for how the spell can manifest based on what they are doing. They expend magic points to cast the spell. If the check fails, so does the spell, and the magic points are expended until they are regenerated. You need a skill at 50% or better to be able to cast a spell using it.
3) Skills like Craft (Whatever) can be used to create objects imbued with a spell, Natural Lore can be used to find potent objects like herbs, stones, etc., and Language (Native) can be used to find potent truenames and words. Essentially, these skills can be used to give the "Trigger" condition to any Common Magic spell. In these cases and others like them, the character rolls the skill and expends the magic points during the period of creation / discovery, but the spell does not trigger until they wish. They must choose the magnitude of the spell during creation / discovery. They don't regenerate the expended points until the spell is triggered. The character must handle or manipulate the item containing the spell, and if it lost, the points cannot be regained until the spell is discharged. If someone else takes the item, they may use the magic points the creator imbued into the object to cast the spell. Only a single use of a spell by a single person may be imbued into an item at a time without the use of the Create Charm spell.
Yes, this means the only use of Create Charm is now to create permanent magic items. That still makes it a really good spell.