The opening experience matters too
The entire proliferate mechanic revolves around adding a counter of a type the card already has, so any card with proliferate will work better than Parallax Inhibitor
But it is very op, as with it you has 2 Gwenhwyfar per turn, with this card being a plus every turn (its effect is the same as having a continuous RotA which activates from the grave, actually)
With the swathe of kill effects on most Assassin creatures, you will be able to trigger Xira almost every turn
Now, with the highest grossing media franchise in the world celebrating its 25th anniversary this year, Pokemon seems as popular as ever, most notably with collectors
Along with this trend, the Pokmon vending machine has emerged as a new retail solution that combines fandom, convenience, and automated technology