Control deck aiming to get down Calderan cradle, followed by playing almost exclusively spells. Only has 4 creatures (the Trailblazers). The fact that the deck has almost no creatures means enemy removal is basically dead in their hands.
In addition it contains Flame Stoker to add a alternative victory condition, as well as generate card advantage (since you can't permanently affect the board state otherwise).
It also has some miniature synergies between echo and second sight. If you pull a Echo'd second sight you can just put it on top to draw again next turn. it makes for a nice extra card draw every turn late game, in addition you can of course also get things like echo'd Harsh rule, wisdom etc.