The cards can only be used from the sets of the last four years
Sure, this Vampire is worth that full three-mana price tag, but since you can warp it for a single mana, you could bring this out just in time to cast a big board wipe
Once I landed (pun intended) on that, I won five games in a row, before succumbing to the strongest thing in Limited since the dawn of Magic: an uncontested flyer
Since the copy also has the duplication effect, this can quickly turn into a situation where you get four or eight new Equipment each turn
Going through this list, there are going to be two different types of card: those that are at their most powerful in small formats due to either raw power level or to pushing out other options, and those that are most powerful in larger formats where synergies allow them to be pushed to their fullest potential
If the spell resolves, the permanent enters the battlefield face down