Thunderlord's Needs to Stop triggering on 1 ability alone.
I don't think it's overpowered at all. But it's abused by champions who can trigger it off of one ability. Champions like Nasus, Morgana, Miss Fortune, etc. are being able to trigger it off of just 1 ability. Pretty unfair for champions to be able to spike the damage on their purposely "not high dealing damage skills" with barely any effort at all.