If youre on the hunt for the next upgrade to your Commander deck or want to make a few tweaks to your Standard deck, we have all the cards that got an upgrade from Magic Foundations
That said, if you can solve the land issue, it's possible to build a deck that can totally hold its own at a casual play level (though I'm not saying you can necessarily solve it)
For five mana of any color, Urza can shuffle your library, exile the top card, and cast it without paying its mana cost this turn
However, we've got a ton now, like the excellent Noble Hierarch (and Ignoble Hierarch)
It also works incredibly well with our Sliver Gravemother since if we encore the Legion we get three 7/7 hasty attackers that are giving all of our slivers +3/+3 for each other sliver in play -- with just Sliver Gravemother and encored Sliver Legion that's a 15/15 Gravemother plus 3x 16/16 hasted Legions
Krabs does what he does best on a card that couldn't suit him better