The rare is a 2/1 with menace and lifelink
If you look at the records of the players who make it there, it's rare to find one who didn't have a great record in the Limited rounds
In game 3 I mulligan to six, then five, then four and keep a hand with Blasted Landscape, Lotus Petal, Fluctuator, and I believe one cycling card
That seems like a lot of set up and not at all what a Burn deck wants to do but Todd Anderson of SCG Tour fame has theorized that it might be what an Arclight Phoenix deck wants to do instead of Pyromancers Ascension as the backup kill plan
Activate only if you control no creatures and only during your turn
Solkanar the Swamp King If Gwendlyn Di Corci was on the not too powerful but at least interesting end of Legends cards, Sol'kanar the Swamp King is definitely on the pretty uninteresting end