Modern land

{t}: add {p/c} or {p/w} or {p/u} or {p/b} or {p/r} or {p/g} to your
mana pool (this mana can be used at instead
of a specific mana asked), and you get {e}.
{t}: you get {e}{e}{e}
{t}{e}{e}{e}{e}{e}{e}{e}{e}{e}{e}{e}{e}{e}: target lands
become an artifact with: {t} put a clockwork
marker on target creature where you get {e}. These
always a ground.