Skyscraper

{t}: Add {c}.
{t}: Add three mana of any one color. Spend this mana only to cast Hero spells or activate abilities from Hero cards. Activate only if Skyscraper is fortifying a land.

Fortify {3} ({3}: Attach to target land you
control. Fortify only as a sorcery. This card
enters unattached and stays on the battlefield
if the land leaves.)