It will be very good in that deck, casting a free two-CMC-or-less spell every time it connects, but you cant recast the same spell due to the exile clause
Murmuring Mystic
While Stoneforge Mystic is a bit of a pipe dream, adding one or two cards like Shadowspear, Sword of the Animist, Puresteel Paladin, Steelshapers Gift, Darksteel Plate or Conquerors Flail shouldnt have been too much of an issue
For starters, you gain one lore whenever its exerted, and on top of that, its an Evasive card, meaning few others are able to actually challenge it, which is crucial when it comes to climbing the ladder to twenty lore
That's not really a surprise, but a utility land that produces or any color mana when being used for dragon or omen spells