Changing Chamber

{t}: Turn target creature into a copy of another creature except it has “{t}: Change back into this cards original creature but it has “{x}: Add {x} Energy””
{w}{u}{b}{r}{g}: Sacrifice Changing Chamber, add {e}{e}{e}{e}{e} and gain life equal to the amount of energy you have, you may pay 4 life to search your library for a card that costs less than the amount of lands you control.