Rapid Fire is a deck that uses the aggressive side of landfall, much like Standard landfall decks used to do with Steppe Lynx and Plated Geopede
Talking on his Blogatog blog, where he answers questions from the community, Rosewater says that he had received plenty of complaints about the cards, which replace all the text with the fictional Phyrexian language
Definitely aimed at Limited
Ultra Magnus, Tactician can sneak cards like Myr Battlesphere or Wurmcoil Engine onto the battlefield for deadly effects
Toski, Bearer of Secrets + Edric, Spymaster of Trest Turning combat damage into card draw is what makes Toski, Bearer of Secrets and Edric, Spymaster of Trest so dangerous once they land
It's true that he can continue to ready himself over and over in a turn, challenging and banishing a bunch of characters