Shalk Exoskeleton is a heavy armor set. The 5-piece set bonus allows you to gain Minor Heroism at all times while you are in combat, generating 1 Ultimate every 1.5 seconds.
Shalk Exoskeleton is part of the base game and drops in Stonefalls in the Overland content. You can also find it on Guild Traders. Each set item is bound on equip. You can acquire heavy armor, jewelry and weapons for this set in the Barbaric motif style.