Although there has been a slow decline in price for the black land in the last week due to no interest from standard players, it looks like Takenuma will still find its place in commander, modern, legacy, and even vintage formats
The deck revolves around cycling a lot of creatures into the graveyard and then using black rituals like this to cast big threats and use Reaping the Graves to recover the cycled creatures
Other more mana-hungry options are Cathars' Crusade (which is a combo piece most of the time) and Elesh Norn, Grand Cenobite (which can be a one-sided wipe most of the time)
When collectors grade those cards, they are often thinking about longevity and preserving or increasing value
One card thats always a welcome sight is Skullclamp
This way, this Mewtwo/Mew could copy cards such as Reshiram & Charizard-GX UNB 20, Charizard & Braixen-GX CEC 22, Heatran-GX UNM 25, Magcargo-GX LOT 44, Blaziken-GX CES 28, Blacephalon-GX LOT 52