Conjure Carriage produces a real carriage to ride in, along with an invisible coachman and "two quasi-real light horses".
This raises a few questions.
One, are these "light horses" as in the smaller type of typical horse, or are they "horse-like things made out of light"? Normally I'd presume the former, but 'quasi-real' leaves it open to some questioning.
Two, how do they react to being attacked? Will they stay where they are? Do they take off running with the carriage still attached? Can you direct them to stay still? Failing that, how easy would it be to unhitch them from the carriage?
The reason I ask is I'm exploring this spell's uses as a means of summoning a quasi-wall/'bunker' in combat, and the horses' interactions with the carriage strongly influence whether this even works or not.
1. 'The statistics above are for a typical riding horse, called by some a "light horse."'
2. GM discretion. I'd make them behave like typical light horses since I've no reason to do otherwise. In such circumstances, you'd need the Handle Animal skill to make them do most things. The horses aren't combat trained, so good luck!
2a. Unhitching should be as easy as unhitching any horse. I'm not sure what sort of action that would take--probably a standard or full-round action unless someone here has more experiences with the use of horse-drawn carriages. If the horses panic, though, that would make things pretty difficult, as the carriage is probably barreling down the road by that point.
That's what I figured was the case on item 1, thank you.
As for item 2, it sounds like if I want to use it like that I'll need to ensure that the caster advises allies to be ready to cut the horses free immediately upon appearance in order to use it as any sort of bunker.
I'll have to think about ways to make that work.