Each class has a primary stat (see Classes ) which determines their bonus to their attack roll.

The primary stat for Rogues and Wizards is a bit special due to how Armor Class is calculated.

  • How is armor class calculated?
    • If your hero can wear heavy armor (Cleric, Paladin, Warlord, Warrior), he or she simply gets the armor's AC bonus. If your hero can only wear light armor (Ranger, Rogue, Warlock, Wizard), he or she gets the better of his or her Intelligence or Dexterity bonus plus the AC bonus of the armor. You can see how AC bonuses are derived by mousing over your hero's stats on the hero page of Dungeons & Dragons - Tiny Adventures.

Since the primary stat for Rogues is DEX and Wizards INT it means their primary stat affects 3 abilities (ATT, AC, DEX or INT)