eu sei Ventriloquismo is an arcane spell and Silêncio divine, so normally most people wouldnt be able to cast both without needing magic items or such.
But if you were to use Ventriloquism to throw your voice into a Silence field, would that work? You are still casting the spell, its just that Ventriloquism makes it seem like its coming from somewhere else.
Silêncio diz:
Upon the casting of this spell, complete silence prevails in the affected area. All sound is stopped: Conversation is impossible, spells with verbal components cannot be cast, and no noise whatsoever issues from, enters, or passes through the area. The spell can be cast on a point in space, but the effect is stationary unless cast on a mobile object. The spell can be centered on a creature, and the effect then radiates from the creature and moves as it moves. An unwilling creature can attempt a Will save to negate the spell and can use Spell Resistance, if any. Items in a creature’s possession or magic items that emit sound receive the benefits of saves and Spell Resistance, but unattended objects and points in space do not. Creatures in an area of a silence spell are immune to sonic or language-based attacks, spells, and effects.
To break it down into a simpler format for understanding (at least for me), silence prevents the following in it's area:
This seems like it would make it impossible for ventriloquism to make sound come from an area of silence, but that is incorrect. Ventriloquismo afirma:
You can make your voice (or any sound that you can normally make vocally) seem to issue from someplace else. You can speak in any language you know. With respect to such voices and sounds, anyone who hears the sound and rolls a successful save recognizes it as illusory (but still hears it).
So while your voice may seem to be coming from the area of silence, it is not actually doing so. So you would be able to make it seem like your voice is coming from an area of silence.
The answer is no. Silence prevents any sound from entering it's area of effect, which is what Ventriloquism tries to do.
Similarly, you couldn't use Ventriloquism to cast spells with a verbal component inside of an area of Silence for two reasons. One, because silence specifically forbids that, and two, because your voice is still coming from the area of silence for the purpose of the spell, ventriloquism just makes it seem like it's not.