This set is probably the worst in a long time for constructed Magic.
Good Playable cards:
Nimble Obstructionist
Abrade
Ramunap Ruins
Hour of Devastation
Ramunap Excavator
Potentially Playable Cards
Claim/Fame (strong card but depends on meta, unearth is only playable because cycling i believe)
Scarab God
Mirage Mirror
Solemnity (as a combo enabler)
Leave // Chance
Honorable Mentions
Adorned Pouncer
Cosign to Oblivion
Bloodwater Entity
Riddleform
(http://mythicspoiler.com/hou/cards/drivendespair.jpg)
;D