See Double [March of the Machine] SM90 Set: Sword & Shield: Vivid

Set: Sword & Shield: Vivid Voltage Type: Water Rarity: Rare Retreat cost: Colorless

Set: The Lord of the Rings: Tales of Middle-Earth Commander Type: Land Rarity: Rare T: Add C to your mana pool

They can't be regenerated

Set: The Lord of the Rings: Tales of Middle-Earth Commander Type: Land Rarity: Mythic Bojuka Bog enters the battlefield tapped

Set: World Championships 2017 Type: Water Rarity: Rare Retreat cost: Colorless

See Double [March of the Machine] SM90 Set: Sword & Shield: VividSet: March of the Machine Type: Instant Rarity: Rare Cost: {2}{U}{U} This spell can't be copied. Choose one. If an opponent has eight or more cards in their graveyard, you may choose both. Copy target spell. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.) Create a token that's a copy of target creature.