Notably, Solitude can be cast without mana, and that's a powerful effect
Hewed Stone Retainers is decent for sealed but probably unplayable in draft
Thankfully, you can still snag the New Phyrexia printing for around $3, so it isnt prohibitively expensive, but at this point it's probably worth digging through your bulk to pull out any copies you have sitting around
As I mentioned before, the most powerful way to build Commander decks with MDFCs is to cut five or six lands (usually basic lands or other utility lands that tap for one color of mana) along with two or three spells and replace them with MDFCs so that you end up with something like 31 or 32 "real" lands but 40 or 41 total lands
In fact, a lot of the time if they are on the play and they attack with Adventurer, you should not block with Thalia, because if you dont then they likely wont have a Turn 3 play