In addition to the new cards, there are some quality reprints such as Karmic Guide, Phantasmal Image, Baleful Strix, Propaganda, and Exotic Orchard in the deck
Really, the only thing holding Riku back is its additional cost to copy those creatures and spells
The very first Mirrodin (then called Bacon) file had three creatures with the enhanced if equipped mechanic
Pure Sets 5-8 decks: if you're running a deck built around a Shimmering Skies, Azurite Sea, Archazia's Island, or Reign of Jafar centerpiece, that archetype lost its key pieces on July 17 and needs rebuilding around Sets 9-13
Chupacabra Echo Arguably better than Ravenous Chupacabra
Kutzil, Malamet Exemplar Legends that tell your opponents that they cant do something have legs as a stax commander