Zoroark GXs Trade ability allows you to discard one card from your hand and draw two more (once a turn before you attack)
Many black cards can offset the life loss with lifegain when a creature dies, so youll rarely be in danger when using it
The tempo of its card effects is adequately good
Necromantic Selection When this resolves, you'll destroy all dorks, then Zombify one to the battlefield under your control
Even if youre playing elves the strength comes from the many creatures youre attacking with more often than a single bruiser, so youre going to need to generate and spend far more mana than its worth to get a worse version of unblockable
In addition, the bottom of the card will have a textbox reading " TEST CARD - Not for constructed play ." The art is also often of lower, sillier quality as it is done in-house by R&D members rather than commissioned artists (hence the lack of artist credit on the cards)