Pumpjack

Build Pumpjack on target land you don't control.
Indestructible
Attached land gains: "{ut}: Add one Tax to your
Capital. Only the owner of Pumpjack may
activate this ability." as long as Pumpjack
is attached.
Pay 3 Tax: Create a copy of Pumpjack and build
it on target land you don't control. Only the
owner of Pumpjack may activate this ability.