mtg kamigawa neon dynasty art cards Junji, the Midnight Sky 1 Card (Gold-Stamped Signature) [Kamigawa Whenever an opponent casts an artifact Kamigawa: Neon Dynasty Art Cards

If that source happens to be an artifact/enchantment creature, even better

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

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

More, bigger magic: that's the Izzet creed

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