It waited on the barn wall for decades, forgotten, looking for the perfect opportunity.

Mystic Skull

{1}, {T}: Add one mana of any color.
{5}, {T}: Transform Mystic Skull.

Under the light of an unnatural moon, it walked out on legs of straw with joints of hinges ripped from the barn doors.

Mystic Monstrosity

Lands you control have "{T}: Add one mana of any color."

{1}, {T}: Add one mana of any color.
{5}, {T}: Transform Mystic Skull. 

 Lands you control have "{T}: Add one mana of any color."