What matters is how these cards fit into the format, how good they are, and how to use them
The uses for this card are many, and though the ceiling is only ever as high as what your opponents are playing, the floor is solid: being able to re-cast a Swords to Plowshares or Cultivate as a red player is more than enough to make you happy
3 Marrow-Gnawer, and Thornbite Staff Infinite creature tokens in mono-black are pretty rare, and it's even better when it uses the go-to rat tribal commander, Marrow-Gnawer
Once the conqueror counter is online, it effectively becomes the Temu Magus of the Moon that turns all those nonbasics into mountains and cuts off splash colors entirely
It is unusable normally until you have your five mana and can still present a risk of death once you have five should they have any way to disrupt your mana production