Mining grounds

This enters the battlefield tapped. {t} and pay either {w}, {u}, {b}, {r} or {g}: Add {1} and one mana of any color you did not use for
the mana cost of this ability. Each color can only be used once in this manner. If no colors are left, you get an extra {1} and a {c} to add to your mana pool.
Miners you control have +1/+1. When a miner card targets this land, don't sacrifice this.
This is classified as if every landscape card is on this. Miner ability tokens being produced are doubled.