Call of the Wild is an ability players can unlock when they have spent 12 points in the Ranger talent tree.
It summons a wolf which fights alongside you for an amount of time. The wolf can be right clicked and set on 'Guard', 'Assist', or 'Aggressive'. When leveling up, players can invest more points to upgrade the basic ability.
Guard: Your wolf will attack creatures, who attack you.
Assist: Your wolf will attack creatures attacked by you
Aggressive: Your wolf will attack the next aggressive or passive creature in its range