Ledge, City of Heights

{t}: Create a Powercell artifact token with "You
may tap this artifact. When this artifact becomes
tapped, sacrifice it and you get {e}."
{t}, Pay {e}{e}: Draw a card and add {c}.
Cards in your hand have improvise (Your artifacts
can help cast those spells. Each artifact you tap after
you're done activating mana abilities pays for {1}).