This is good for creatures like Elesh Norn, Grand Cenobite or Syr Konrad, the Grim that youll want on the field more for their effects than as attackers
And if your spell was more than one color, you'll layer them up
In every game I have seen her this year, I have been impressed and entertained, regardless of if I was winning or losing
Still, out of an abundance of caution, let's say that the Ultimate Box Topper adds about $40 to the value of an Ultimate Masters booster box, to be safe
Card not found couldnt target the opponent, but could let you get rid of some 1/1 you had (for whatever reason) and get two cards for your trouble
Where I give Costume Closet the edge is in addition to death, flickering, and airbending easily reset the Closet or refill it