If One with the Multiverse leaves the battlefield and later returns to the battlefield (or you play a second one), it's considered a new object and you may cast a spell using its last ability regardless of whether or not you did so earlier this turn using the enchantment that was on the battlefield before
In short, play boosters add the rare counts of set boosters to make them more optimal to open than Draft packs, but with a pack structure and design intended for Limited
The transformation to Trance Kuja, which doubles all Wizards power, is icing on the cake
As such, you almost always want four copies of your combo pieces in your main deck (to maximize your chances of drawing them) and then typically some cantrips, card draw, and filtering to find the pieces that you need
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