The three spells I'm asking about: Spiders, centipedes, and ants.
Long story short: The effect is a whip, it's not target: personal or anything, and the spell doesn't explicitly say you have to be the one to wield it. The whip deals fixed damage and can't make a few combat maneuvers, but the real point is that it's a melee touch attach with 15-foot reach that nauseates foes, seemingly using the caster's save DC. It also poisons foes, but that's just frosting.
Can my theoretical druid Steve cast this spell and hand the created whip to Larry, his whip magus buddy and have Larry use it like he would a normal whip?
Also, in a separate post as per the Design Team's preferences, I see it's a conjuration (summoning) spell. I assume this means that feats like Moonlight and Starlight Summons can be applied to let it overcome DR/silver and cold iron? To make the question clearer, does a swarm's swarm attack count as a natural weapon for the purposes of feats like Moonlight/Starlight Summons, spells like magic fang, and so on?
I doubt this will be too cheesy, given that Evolved Summoned Monster is the real cheese and it specifies the summon monster line, but I felt it was germane.
No, it isn't transferrable. Specifically says 'you wield', and grants no power to transfer. With spells 'you' is the caster.
Magic fang won't work as 1)it isn't a living creature. (it's creatures) and 2) swarms are unaffected by spells that target a specific number of creatures.
The 'x'light summon feats - no idea...I'm sure someone with greater knowledge than I will point out where I'm wrong, but on the face of it it should work.