Auction House Players can sell items to an auction house. The system will charge a certain amount of transaction fee, similar to World of Warcraft.
PS: See?Almost all the items are expensive, so work hard!
Combats When you are in combat, the background music will change accordingly to make you get excited. You'll experience smooth combat in Aion. But it seems most monsters have high HP, so it's not easy to kill them. If you're a solo player, when you notice that you're outnumbered, you'd etter retreat as soon as possible.
The monsters won't chase after you long, so you can eaisily shake them off. When you're in combat, you can use both red potion and blue potion which take same time to cool down, also similar to World of Warcraft. According to my calculations, the cool down time is 20 seconds. When the combat is over, click the monster's corpse and then the button in the bottom right corner, and you can pick up the drops.
You don't need to target at the monster when you're casting spells. The system will do it for you automatically, which really reduces difficulty. When you click a monster, the distance between you and the monster, the monster's level and HP will be shown in the bottom right corner of the screen.
Monsters There are a lot of novelty monsters in Aion. Just like what I mentioned above, most of them have high HP and they can use skills, such as fainting, migty blow, etc. But only monsters in human forms will help each other. Anyway, I didn't see any monsters in animal forms helped each other. And only a few monsters will attack players initiatively. I have only encountered three types of monsters which attacked me initiatively. Monsters will drop gold, potion, weapons, equipment and some green items which may be materials for crafting. And I happened to find that high level monsters will bully low level monsters.