User blog comment:Xyclone010/Catch 'Em All Mode/@comment-1455803-20140623075240

The coolest thing that comes to mind would be Karthus with Annie's passive. Spamming Q (and possibly toggling E) means you'll have your stun ready pretty much whenever you can possibly want it in lane, you can potentially stun a bunch of times in a teamfight, and his with his ult, he has a ''global, undodgeable, 5-person stun. ''Up to 1.75 seconds long. With ultimate-level damage attached, to boot. Suddenly everyone on the enemy team is buying Zhonya's, Banshee's, or both.

There are any number of additional passives that could work well here. A standout would be Ryze's, which would have slightly mind-boggling potential if you could master the timing of toggling E between Qs. Letting that aforementioned ultimate come off cooldown really fast sure doesn't hurt, either. Another possibility would be Brand's - adding even some more DoT damage to that ultimate is pretty nice, and in lane it gives a nice edge to your Q harass. Adds a lot of damage to E, too, if you can safely use it (a big IF without his natural passive.) Since that damage is %max health, it means even tanks get scared.

There are any number of other options that are interesting possibilities (Vlad's or Galio's for tankiness? Malzahar's to command a true Voidling army? His own, so not even death might stop his wrath?) but those are the big ones that occur to me.