The Mercenaries Guild is one of the guilds that Ezio can call for when he needs help. Each guild has three sets of challenges, and upon completing each set, you will unlock a reward for Ezio to use. SET 1 ======= - The cost of hiring Mercenaries is reduced. 1) Use Mercenaries on guards (10 times) 2) Destroy a scaffold by throwing someone into it (5 times) 3) Kill an enemy using a thrown weapon (5 times) SET 2 ======= - Unlocks Mercenary Crest, as well as their ability, which makes Mercenaries push away beggars that you encounter 1) Disarm and kill a guard with his own weapon (5 times) 2) Kill a Byzantine Almogavar (25 times) 3) Perform a Hook and Throw (10 times) SET 3 ======= - The Broadsword is unlocked 1) Perform a double Assassination (10 times) 2) Kill 5 guards in under 10 seconds in melee (1 time) 3) Perform a combo kill streak of at least 5 kills (10 times) 4) Kill an Ottoman Janissary (25 times)