In my experience, control decks employing Stoneforge Mystic are a favorable matchup in which Wasteland is generally very effective when recurred with Life from the Loam. Stoneblade decks are threat-light, and like to run on three to four mana or more, so keeping them mana-constructed is an effective strategy.
Some Stoneblade decks do play Blood Moon, so if you see basic lands, make sure you fetch your green and black basics, or set up a Deathrite Shaman / Mox Diamond if possible.
The biggest threat from this type of deck is typically the Counterspells that allow them to land a threat and tempo you out of the game. Take away their early game creature threats and you should be fine. Just watch out for True-Name Nemesis or Jace, the Mind Sculptor as many of these decks play several of each, and both can be difficult to remove pre-sideboard.
Some variants of Stoneblade decks use Lingering Souls, which can make Marit Lage wait around for a few turns until you can finally attack for the win. This means you will need to defend Marit Lage more carefully against cards like Liliana of the Veil, Jace, The Mind Sculptor, Council’s Judgement, or Swords to Plowshares.
Pyroblast is another problematic card, since games typically go longer, and your opponent can counter Intuition or destroy your own Jace, The Mind Sculptor, which is an effective card in the long game.
