Well welcome to the forums shorman13!
Sosrukos taunt is very cool in that it targets mages!
And there is no type to sosrukos attack or taunt, so if you get the taunt on the creature, he has to attack sosruko, and his awesome ferret defense!
Here is the description provided in the codex of the rules book for reference.
This is a special condition that can be caused by the
attack of certain creatures (In this set: Sosruko, Ferret
Companion). Place a Taunt marker on the creature.
Taunted creature must make a melee attack against
Sosruko during its next action phase, if able, and if
Sosruko is in its zone. If it is required to make an attack
on a different target from a competing effect (such as Bloodthirsty), the
controller may choose which target to attack. Remove taunt at end of its
Action Phase or whenever Sosruko is activated.
