I do love the upside-down version of this card from the Secret Lair crossover though, and the card can gather quite a bit of card advantage at tables that are amenable to 8-drops
Key also created all-or-nothing situations, because you can strand the Key without anything worth untapping
2016-06-08 Once the creature is returned to the battlefield, Animate Dead cant be attached to anything other than it (unless Animate Dead somehow manages to put a different creature onto the battlefield)
And it can fetch a high price on the secondary market
Found on the sets Summons, these Summons are only around for a few turns, however, they pack a punch during that time
Many players enjoyed how the set truly captured the feel of the Phyrexians from the gameplay to the mechanical themes to the art to the overall look and feel of the cards. And here is one of the lessons learned from that same set: The Phyrexian flavor was off-putting