Lu Wu, Deity of Mount Kun Lun

As long as Lu Wu, Deity of Mount Kun Lun
is in play, all western ancient lands gains the ability: "Add 1 more colourless or green
mana to the mana pool whenever this card is tapped to produce mana."
Mighty as he is, even Lu Wu is just a governor
of a mere earthly city under the control of the heavens.