Thriving Moor (TLE)

Land

This land enters tapped. As it enters, choose a color other than black. {T}: Add {B} or one mana of the chosen color.

Niche mana fixing for black-based two-color decks, but enters tapped and requires setup, making it strictly worse than dual lands with no drawback like Badlands or Verdant Catacombs in any format where they're legal.

Avatar: The Last Airbender Eternal — Common