Despite the jokes about it, I actually think stealing Udyr ult is.. pretty good

Here is Udyr ult: https://i.gyazo.com/579ee45019c35f964f45c851e54f498a.png

The way it works with Sylas is pretty interesting: Once you use it you have semi-infinite time (lasts 5 minutes I think) to proc TWO of the fire cone attacks. So you can use Udyr ult, which unleashes 4 pulses around you, auto attack for a fire cone, then your third auto attack after that will proc another fire cone (this is where the cooldown starts sadly, so you cant use Udyr ult to get the 5 minute buff and then copy another ult with the buff still active).

All of that combined has 220% AP scaling, the only problem is that Udyr can put 5 points in his R, but Sylas can only put 3 in it and its based off Sylas R rank. So the base damage is at best 120 on everything, which is still 360 base damage tho.