Dex/AC Bonus
As a bonus, as you level, you will gain extra AC. This is determined by the base DEX that your character has. The formula is as follows:
Dex 18 = Every 4 levels you will recieve -1 AC
Dex 16-17 = Every 5 levels you will recieve -1 AC
Dex 13-15 = Every 6 levels you will recieve -1 AC
Dex 10-12 = Every 7 levels you will recieve -1 AC
Dex 7-9 = Every 8 levels you will recieve -1 AC
Other Bonuses
+1 "to hit" for every 3 character levels
+1 Melee-only damage for every 10 character levels