We have seen that he can communicate with his subordinates over long distances through telepathy, he's the only one in the series so far with this kinda ability. Maybe we have seen just a tip of the iceberg regarding his mental powers. I can imagine the AL reading thoughts, controlling the actions of others, manipulating thoughts and memories, mentally inducing pain, paralysis, unconsciousness or even death in other people. Maybe he can completely shut down the mind of others, the potential is freakin enormous. What u gonna do against a telepath ninja? u gonna do nothing u gonna die!