Focused Fury (Su)
In the fury of combat, a magus sometimes finds herself facing a dangerous enemy, but unable to unleash some of her more dangerous magics for fear of injuring allies or innocent bystanders. This arcana is the solution to that problem - the magus may use any damaging spells to make a touch attack as per the normal Spellstrike rules, even if the spell does not normally have a range of touch. However, the spell does not affect anyone or anything other than the target struck, even if it would normally generate an area of effect, jump to nearby enemies or otherwise affect additional targets.
Only spells that inflict numerical damage may be used with this arcana; it does not function with spells that only inflict negative conditions, curses, illusory effects or other harmful but non-numerical results. Negative effects resulting from damage still apply - for example, if a target is temporarily slowed by cold damage - but not those based on environmental conditions, such as visibility loss or dangerous terrain.
A magus must be at least 9th level before selecting this arcana.
DESIGN NOTES: The wording is a bit crap, and I apologize for that, but I'm hoping the intent shines through, as I think it would be an interesting, useful evolution of the magus' role on the battlefield. Basically, it's a way to make the Spellstrike ability a bit more versatile, but at the same time force the magus to potentially make some hard decisions. Sure, this allows them to fireball a single target with a melee strike without risk of accidentally roasting their friends or nearby innocent bystanders, which could be incredibly handy at times when they've burned through their relevant touch spells but still have a dangerous enemy at the end of their blade.
At the same time, however, they're using one of their powerful AoE attacks against only a single target, which may make them hesitate as they might find themselves arrayed against a group of enemies in the future. It may not always be a hard decision, but I know it's enough of one that it will give them pause from time to time - "Do I really want to blow an AoE on a single target?" - and I think that adds a nice tactical wrinkle to the effect without making the arcana too crunchy.
As another note, I put in the restriction against spells with non-numerical effects as sort of a blanket way of covering present and future spells that do hideous things but aren't direct damage. It's already a potent arcana; I didn't want it to be a blank check to drop any nasty spell through the blade, just the ones whose primary intent is to inflict big hit point damage.
As for the level restriction, I put it in shortly after they get the first big AoE spells, like fireball, to reflect that they've had enough time to "practice" those sorts of spells that they might have figured out this trick as a result. If it seems too powerful for 9th level, though, I could easily see it going up.