If an opponent doesnt have a permanent to remove, they lose a card from their hand instead
With Sol Ring, Arcane Signet, and token-generation, you might be seeing this as soon as turn three, effectively stopping you or your opponent from the first major board progression
And of course, I would be remiss if I didnt mention that these D&D cards, while not impossible to reprint, often evade such reprints due to the implicit nature of cross-overs
Seriously, the difference between Turtle Power and Lorwyn Eclipsed is night and day (or Lorwyn and Shadowmoor) - at least when it comes to the lands
When this creature enters, search your library for an instant or sorcery card with the same name as a card in your graveyard, reveal it, put it into your hand, then shuffle
It does other stuff too, but thats the main bit