1. There are 5 factions in the game: Undead, Legion, Forest, Shadow and Light.
Their relationships are: Undead > Legion, Legion > Forest, Forest > Undead, Shadow > Light, and Light > Shadow.
2. There are 5 classes in the game: Warrior, Assassin, Ranger, Mage and Priest. Each class is tied to either Strength, Agility or Wisdom. Heroes can only equip gear based on their class.
Warrior - Strength
High survivability, but low attack. Great for taking damage in the front row.
Assassin - Agility
Low survivability, but very high single target attacks.
Ranger - Agility
Great with normal attacks and skills, which make them a good choice for sustained damage output.
Mage - Wisdom
Low normal attack, but deals tremendous AoE damage.
Priest - Wisdom
Average damage, but great at healing.