A planeswalker that kills other planeswalkers? Wicked and awesome. Alas, wizards would never print something like because they would have to come up with a new rarity for it. That, and it would be worth infinite amounts of money. :D

Not to mention a planeswalker killer is extremely narrow. You'd be printing it in the hope it's good enough to wipe constructed because it's pretty plain for it's abilities otherwise. Also, do you mean for his ultimate to kill himself too ?

As the text box shows, there's far too many words here. Lose the name of the token, and the final ability can just say "for each card". But where are you wanting to exile them from? If it's from the battlefield, then don't say "cards"; if it's from graveyards or hands, you need to say that.

Have reworded him slightly to reduce the wordcount - thanks Alex. His +1 and -2 abilities are meant to stock graveyards in preparation for his ultimate. I added Planeswalker mainly for thematic reasons - they are alive so he can kill & reanimate them. May need to work on him a bit more though

Flavorwise, Planeswalkers don't die, they just decide they've done their part or you're not worth helping out anymore and poof away. (using their ultimate without an extra loyalty counter or taking too much damage). I think it's really stretching things a bit far to think a being as powerful as a planeswalker can be killed just like that.

Point taken, have readjusted the abilities slightly, removing planeswalkers.

It's worth noting that Nicol Bolas, Planeswalker can destroy other planeswalkers. The flavour of this may be "defeat" - i.e. no matter how loyal they are, he can just neutralise their power for the length of your duel. However, he does cost 8.