Mana Aqueduct

If you tap fortified land for mana, you may
have another player of your choice add that mana instead. If you do, you gain life equal
to the amount of mana added this way.
Fortify {1} ({1}: Attach to target land you control. Fortify only as a sorcery. This card
enters the battlefield unattached and stays on
the battlefield if the land leaves.)