Land
{T} : Add {1} to your mana pool.
{T} : Add {B} to your mana pool.
Activate this ability only if you control a Swamp.
{T} : Add {R} to your mana pool.
Activate this ability only if you control a Mountain.
{T} : Add {W} to your mana pool.
Activate this ability only if you control a Plains.
好像有点没创意XD