Twist 3 mana rock

Type: Artifact

Subtype: NONE
Card text:
"You may have CARDNAME enter the battlefield as a copy of target land, except it has "{2}: Add one mana of any color.""

Expected rarity: Uncommon (U)
Rarity Reasoning:
- Copies Lands.
- 3 mana rock which provides Mana Fixing.
- Expensive Mana Fixing
- Protection from Artifact removal.

Innovation: 3 mana rock that is actually a land.
Choice of effects:
- Copying a Land provides Land synergies.
- Having it not be an Artifact provides protection.
- Giving it a mana filtering ability helps deal with the fact that the player might not have a Land of the color he needs to copy.

Tentative cost: {3}
Cost Reasoning:
- It's a mana rock for {3}. That's it.

Possible alterations:
- If the Filtering ability is too strong, it could be switched by a different one, or removed.
- Changing the cost of the Filtering ability.
- Making it be an Artifact on top of a Land, for synergy or being more susceptible to removal.
- Having it untap if it enters the battlefield tapped.
- It only copying lands with certain restrictions.
- Giving it a land subtype

Innitial Name: "Piece of Land"