The Henge at Center Hill

Fortified land has "{t}: Add two mana of any one color to your mana pool."
Whenever fortified land becomes tapped, create
a 1/1 green Elf Druid creature token.
Fortify {1}{g}{g} ({1}{g}{g}: 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.)