Planeswalker - Urza (Loyalty:4)
+2: Put a +1/+1 counter on all artifact creatures you control. Put a charge counter on all non-creature artifacts you control.
-3: Remove all counters from all other permanents. For each counter removed this way, put a loyalty counter on Urza Planeswalker.
-15: Exile all other permanents. For each black permanent exiled this way, its controller loses 3 life.
Now, why don't we create a card for the other planeswalkers that appear in the storyline? Like this un-innovative design:
Jaya Ballard, Master of Fire
Planeswalker - Jaya (Loyalty:2)
+2: Destroy target blue permanent.
+1: Jaya Ballard, Master of Fire deals 3 damage to target creature or player. A creature dealt damage this way can't be regenerated this turn.
-7: Jaya Ballard deals 6 damage to each creature and each player.
Freyalise in Skyshroud
Planeswalker - Freyalise (Loyalty:4)
+1: Search your library for a basic land card, put it onto the battlefield, then shuffle your library.
-1: Target creature gets +3/+3 and gains trample until end of turn.
-8: You get an emblem with "Permanents you don't control don't untap during their controllers' untap steps.