Would a potion of Fiery Shuriken be legal? I have been thinking about the benefits of this as a Vivisectionist using Alchemical Allocation to reuse the potion. A shuriken could be released as a swift action each round for an extra ranged sneak attack.
No, or at least not in a good way. The person who drinks the potion is considered the caster *and* target of the spell the potion emulates. So, you could do it, but you'd be shooting yourself.
Never noticed this before, but a potion can only contain a spell with a Target of "one or more creatures or objects". Fiery Shuriken doesn't have a target entry and so can't be made into a potion.