Shinedust is one of the many currencies in the game and can be obtained from cards or earned as a reward by completing missions
With the creature-land, you can always turn Wizards Lightning into at least a Lightning Strike by tapping the Mutavault to activate itself
In that vein, I would like to point out that the enemy colored (Green / Blue, White / Black, etc) Slow lands from Midnight Hunt and Crimson Vow are being reprinted in Secrets to Strixhaven, probably bringing some prices down
Creature - Shapeshifter Snake Clones (CTRL to add secondary) Copy Lithoform Engine , : Copy target activated or triggered ability you control

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