Intelligence is the Attribute which characterized by many Actions that deal damage to all creatures (
In Control Decks this Attribute is one of the main. There are a lot of good AOEs (
In Midrange decks you can also play cards with this Attribute. There are some good midrange decks with Ward synergy. Also you can sacrifice your own minions with Last Gasp (
You can also use the cards with Intelligence Attribute in Aggro decks.
On Arena this is the one of the strongest Attributes.
Intelligence Attribute is one of the components of four classes: Battlemage, Assassin, Mage and Sorcerer.