If you could add a champion from another game universe, wich one would you choose?

I'll start, The Kid from Bastion. We all know we want him.

Melee damage with the WAR MACHETE every 5 secs (similar as Shen's passive). The Q takes his CAEL HAMMER in your face activate again for knockback. The W brings the BULLHEAD SHIELD charging to the enemy and reflecting 20% of damage taken for 2 secs (mini thornmail). The E does ranged aoe damage with the SCRAP MUSKET and debuffs. And finally, the R shots the CALAMITY CANNON 3 times (picture Xerath's ult) and slows people in the area for 1 sec (mini Anivia's ult).

Is my guy OP enough? low AP/AD ratios for balance ;)