Its also a reasonable answer to otherwise game-ending hate effects like Dauthi Voidwalker, or white exile effects Sanctifier en -Vec and Rest in Peace
Then they will mill half of what remains in their library as the second Mindbreaker's ability resolves
They make up for the fact that they often cant move by being incredibly fast
Evendo, Waking Haven Evendo, Waking Haven has the potential to become a land that generates a lot of mana based on the number of creatures you control, but you need to do a little work for that to happen by stationing this planet
While the lack of consistency is a bit maddening (*cough* Eldrazi Temple *cough*), over the years, Wizards seems to have taken a view of Modern in which cards that add one additional mana are safe but cards that add two extra mana should be banned, and over the years, the banned list of the format has come to reflect this ideal fairly well
(2/5/2021) The subtype Shapeshifter that appears on the type line is mostly there to reinforce the flavor