User blog comment:EloHell/William - Dragon Slayer/@comment-4022742-20121130132001

No. Your Q cannot have an AoE knockback effect every 4 (2.4) seconds. If you cannot see why this would be OP you are blinded by the "limitation" of not knocking back your origional target.

Your base damage and scaling are trough the roof as well. Riven, Wukong and Tryndamere are good measuring sticks, with the highest base damage being 240 with a mere 0.8 bonus scaling. The highest scaling is on tryndamere with a 1.2 value, which is his only AD scaling skill. Take note that neither of these skills apply any kind of CC. When you look at skills that do apply CC you come to riven, who has 2 skills with 170-180 base and 0.7-1.0 Bonus scaling damage. With a 13-7(7.8-4.2) second cooldown on those.

Your ult amplifies the damage of the amount of armor and mr a target has? So having 1000 armor and mr and 50% health will make your ult deal 1500 true damage on top of 200% of your AD as physical dmg? A Graves with GA should have around 300ish armor and mr, with 80% health it would deal 540 true damage on top of 200% of your AD as physical damage? This being a ranged abillity its very vital to know how far you can throw this thing, if it goes too far, it will be OP, Maybe not as strong as Darius ULT damage wise or refreshing, but he has to actually apply hemoorige charges before doing his OP dunk. If its going to exceed 600 range, it's scaled too high atm.

SUGGESTIONS
 * Swap the knockback and snare effect on Sunder, making the AoE KB conditional and on a 10(6) second cooldown.
 * Decrease the snare to 0.32/0.5/0.66/0.7/0.8 seconds. Or up the cooldown by 10/9/8/7/6.
 * Revisit the base damages and scaling values of your skills

Overall I like your concept, it just needs some number and mechanics tweaking and clarification ;-)