Weirdly enough (although obviously it doesn’t actually mean anything) I was designing a card for just this thing in a dream recently. I just don’t remember what it did. I do have a design of this on our Guild forums. Funnily enough, it was also a 12/12 with a casting cost of 2UG, but that’s pretty much the extent of the similarities. Well, that and it couldn’t attack early either. Mine required you control 20 lands. It also had a partner and it gained a +1/+1 counter any time any player revealed a land card from their library or put a land card into play from the library.
Aaanyhow…
Wow. What to do with this?