The source is what allows spells to be cast, and the collar is supposed to squelch the source which in turn, is supposed to prevent ANY and ALL spells from being cast, and yet every NPC with a collar on is still able to cast spells.
No.
Source Magic != All Magic. That's probably the single most consistent thing in the lore dating back to Divine Divinity. Even there, the healers had trouble using Source, but regular spells worked just fine.
UMM all spells in the divinity universe are source spells because source is the mana needed to cast the spells, eliminate the mana, and you render a mage useless.
In the divinity universe there is no such thing as "Source Spells" All spells are source spells. Again Source is nothing but the mana required in order to be able to cast any and all spells.
No. Source Magic also != Mana. What you're saying has literally never been the case, ever, in ANY Divinity game.
