Dark Souls 2 Infusion Guide – Infusing with Faint Stone vs. Magic Stone

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What exactly is the difference between infusing with a faint stone and infusing with a magic stone?

I seem to understand, that a faint stone will cause a weapon to deal magic damage or a shield to reduce incoming magic damage.
But what does a magic stone do?

The wiki pages left me rather clueless…

Background:
I'm a sorcerer, carrying the Witch Tree branch to cast spells and using a sword in the off-hand for enemies with high magic resistance.
I infused the branch with a faintstone, as was suggested in another question.

Best Answer

The faint stone adds magic damage scaling with your INT, and the magic stone adds physical damage scaling with your INT. Both reduce other scalings and base damage. Also the faint stone can be used on shields but not the magic stone.

All else being equal, the magic stone adds less damage than the faint stone but since it's purely physical you don't have to deal with multiple resistances.