Sneak Attack & Magic Missile

[kitep]

PC may soon get magic missile, CL3, which means 2 missiles.
He has 1d6 sneak attack.

Assume he wins initiative, so the target is flat-footed, and sneak attack applies.

1) Ami I correct in assuming SA applies to magic missile?

2) Would SA apply once total, or once per missile, or once per target?

TIA

[ClayQ]

SA shouldn't apply to spells, spells aren't weapon.

RAI Precedent is set in 3.5e with the spellwarp sniper PrC allowing you to SA with rays.

Assuming you are allowing SA on spells, I would disallow SA on MM simply because MM has no attack roll so the flavor of "striking a vital" isn't really possible as the magic guarantees a hit not a vital hit.

If you did apply SA, you've already thrown the balance table away, opinion you may as well allow it per missile.

[kitep]

Thanks.  Not applying SA to spells makes everything simple.

[snakeman830]

Complete Arcane has a section on spells as weapons, which would cover when they can be used to sneak attack as well. 

Basic version, a spell must require an attack roll to count as a weapon and to use with sneak attack.  Some additional caveats (summoned monsters don't get to benefit from your weapon-enhancing stuff, as one example), but that's the most basic.

[kitep]

Cool.  Magic missile doesn't require an attack roll, so it wouldn't get SA.
And Complete Arcane mentions that a spell that allows multiple attacks, only the 1st gets SA.