Certainly there are lots of legends in the cube and that is part of why this list looks so conventional
Since last Fridays big announcement, word on the Magic: The Gathering streets has been all about Tarkir: Dragonstorm
You need to be able to follow up Lands coming in and all that ping damage with a Treacherous Terrain
Stromkirk Occultist, and Call to the Netherworld are examples of really good options with madness that result in card advantage
These include cards such as Avatar Aang (flying, firebending, transform), Aang, at the Crossroads (Ally fetch, transform), Boiling Rock Rioter (firebending, Ally reanimate), Earth King's Lieutenant (+1/+1 counters), Fire Lord Zuko (firebending, +1/+1 counters), General Tazri (Ally fetch, anthem effect), Hakoda (cast Allies out of your deck, protection), Katara, the Fearless (double triggers), Katara, Water Tribe (vigilance, 1/1 counters, waterbend), Sokka (menace, prowess, 1/1 tokens), and many more