For newer players, what that means is that if you tap a Forest for a mana you can get another Green mana, but if you tap something like a Watery Grave for a Blue mana, you can also get one Black mana for free
This allows you to use Aetherflux Reservoir as a wincon
Feasting Troll King If you have the food and the fixing, Feasting Troll King is an obnoxious card to play against
Like most Pokmon cards, the value of Unown [V] depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Legends Awakened)
Catch them at the bottom
If you strongly disagree with any of these or are confused about why I like them more than the general public, feel free to get in an argument with me about it on Twitter!