In looking at the price pattern of Mana Crypt, we can see that the real floor on this cards base printing (focusing on This price floor is important because, as I mentioned before, Mana Crypt is functionally banned from Magic now, and unlike fellow Vintage all-stars like Speculation As with any rapid and emotional shakeup, theres also been a significant amount of speculation in the markets, something best demonstrated with the younger cards among the bans, such as First, establishing a floor
Usually I upgrade their manabases right away because I dont think ETB tapped lands ever make games more fun
This has pushed me to value mana rocks higher than normal, often dedicating my first few turns to getting out Sol Ring, Rakdos Signet, and Thran Dynamo
She is very much about the -3 ability, killing a key threat and leaving you with both a planeswalker and a Treasure (which is especially nice with Fatal Push)