Yes, aerial combat is possible but since you can fly for 1 min only, if you don't finish the battle in 1 min then you will just drop and die if you were flying too high lol. and yeah there are invisible walls where you can't fly over. you can only fly in certain zones, can't fly everywhere. although, it is possible to fly anywhere in abyss.

Are there many robes and weapons for your class to choose from? are there any restrictions to when you can use them?

Irisviel: there are many robes from vendors, mobs and tailoring. but weapons... i am not even sure if sorc can use other weapons such as sword or dagger or staff... sorc's default weapon is a spell book. my sorc is level 15 now and i am still using the Aion Gold book and have no idea if it's possible for me to learn new weapon skills. people said it might be possible with stigma system but no one knows since no one found stigma yet. there are level requirements for items.

I read somewhere that mages will be able to use orbs also but orb is probably spiritmasters default weapon... Anyway does books differ in looks or all of them look exactly the same. What bonuses they give?

Irisviel: some are simliar in looks, but mostly different. well, books usually have mana bonus, magic defence, auto attack damage etc. rare ones got better stats of course as in could have some life bonus along with mana etc. and yes orb is spiritmaster's default weapon.

What can you tell us about end game content?

Shilenne: Do not hold me to this, but I've had Iris ask that question on the korean official forums. Some of the answers he received from the other players (that are higher ranked or chosen for previous beta) are that there will be a lot of end game content, and they'll be lore relative (draconic raid bosses? outdoor ones and indoor ones?) The Abyss is the high level zone where all this PVP PVE end Aion Gold game will happen at. As of current though t hey did not release specific details on the end game content, just that there will be that aspect in the game and they're working on it currently.

As I have seen on many screenshots there only seems to be one skillbar. Are you constrained to a finite amount of skills on your bar like Guild Wars? Or can the UI enable you to create more slots to almost litteraly fill your screen with skills, like on WoW? or are there too few skills to tell atm because of the level?