Myth -
5'steps never provoke AoO's.
If you're asking about Feral threatening Silv's spellcasting, then yes that move would make you safe assuming he doesn't have reach.
You could also try to Cast Defensively (See the concentration skill).
re: Dragon Magic/Scrolls - Sure, but as with any non-core material, you'd have to find it in game (Wouldn't be very difficult, but you can't just walk into a random shop in X town and say "scroll of Arcane Spell Surge, please"
Re: Shapechange - You need to read the spell, there's a lot of little nuances that would take too long to explain via text. As far as what creatures you can turn into - Any creature in the Monsters Manual of 22HD or less that you know about. (Either something you've seen or can make a knowledge check to identify).
For example if you wanted to turn into a Greater Earth Elemental, you'd have to make a Knowledge
lanes check DC 31(10+21 HD). For an Adult Green Dragon you'd need a Knowledge: Arcana DC 30(10+20hd). You can take 20 on these checks.
I allow non-monsters manual creatures only if you see them in Game.
(BTW, no you cannot use Templates on the creatures you change into)
Also to everybody - when asking questions about your characters could you guys please include their name? It's hard to keep 10 Characters's straight with the right player. *L*