I never considered Land Grant because I find myself wondering if the cost of revealing that information and having them counter it is worth it. That's definitely an exploratory idea.
I do recall from years past about seeing Land Grant in the Grow era.
It's worth a try. If we are looking at still using the Basking Rootwalla and Hollow One, then how would the manabase look?
Here is what I am envisioning to start:
1 Black Lotus
1 Mox Jet
1 Mox Emerald
??? Additional Lands
4 Land Grant
4 Crop Rotation
Non-mana producing lands
4 Bazaar of Baghdad
Here is my original thought process for comparison:
With the use of stitcher's supplies, carrion feeder, etc, I think having access to black/green mana to 'cast' the gravecrawler is how we should consider recurring the vengevines as well as dig for answers (similar to how dredge uses it in the post-sideboard games).
Having access to mana gives us to several pieces of universal removal: abrupt decay, assassin's trophy, maelstrom pulse, beast within, thoughtseize, cabal therapy, duress and possibly more?
In comparison to pitch dredge, I think the deck can go on the offense and have a solid removal plan from the get-go. If we dig on this rabbit hole a bit further, we'll have access to regrowth effects as well.