Rex, Dimensional Pillager

+1: You get an emblem with "Whenever a creature attacks a Rex Planeswalker you control, this emblem deals 1 damage to that creature."
-4: Gain control of target nonland noncreature permanent.
-7: Gain control of all nonland noncreature permanents, then Rex deals damage to each opponent equal to the total converted mana cost of those cards.