The Card Caster archetype of magus gets an ability that replaces the normal spellstrike, called Harrowed Spellstrike.
Beginning at 2nd level, a card caster can invest a single thrown weapon with a single touch or ranged spell as part of the spell’s normal casting time. The spell must target a single creature, and the spell’s range changes to match the thrown weapon’s range increment. This ability otherwise functions identically to spellstrike, except it can only be applied to thrown ranged weapons instead of melee attacks.
Now the wording seems to suggest ALL ranged spells, not just ranged touch spells. And this leads to some odd situations. Is it truely all ranged spells? or is it intended to be just ranged touch?
If its all ranged spells then :
Eg. Spellstrike magic missile. Do the cards gain the unerring properties of the spell? or does that make magic missile able to miss?
What about ranged AOE spells like fireball? Since it says it must target a single creature, and fireball targets a single area, would it be castable?
Please try to backup all answers with official rulings. Looking for RAW but would also like to hear RAI.