N.I.M.H. Laboratory

When N.I.M.H. Laboratory enters the
battlefield, you must return another land
you control to your hand or sacrifice this.
Pay 4 Life, {t}: Add {c}{c}, and create a 1/1
Rodent creature token that is all colors.
"Your scientists were so preoccupied with
whether or not they could, they didn't stop to
think if they should."