*Viktor* and *Azir* cause the game to crash in the first 3 minutes of the game.
Just by choosing them in champion select, you are asking for everyone to leave the game.
*Fizz* is also able to get an auto attack out while in playful/trickster. Or at least it seems that way.
His auto attack animation is able to go off while in playful/trickster, not sure whether or not it does that damage.
*Xerath*'s E indicator is also just a straight long line acrossed the map, and the stun seems to act as a fear rather than a stun. (At least on bots.)