MMORPG.com: What exactly is a patron power?

Matt Miller: A Patron Power is a power in a power pool that is granted by one of the four lieutenants of Lord Recluse; Ghost Widow, Scirocco, Captain Mako, or Black Scorpion. They are themed power pools that tie directly in to the backstory and powers of the person who grants access to the pool.

MMORPG.com: Are patron powers available to only characters of a certain class or level?

Matt Miller: You must be level 40 before you can begin the Patron Story Arcs which unlock access to the Patron Power Pools. All Villain Archetypes are eligible to run the story arcs, and thus earn the Patron Powers.