Dimensional Gateway

When another permanent leaves the battlefield,
add {c}{u}{b} to your mana pool. When another
non-land permanent you control becomes tapped
you may pay {p/c}, if you do, you get {e}. {e}:Cast a permanent spell from your hand without paying
it's mana cost, return that permanent to it's
owner's hand at the beginning of the end step. {e}{e}: Populate {e}{e}{e},{t}: Choose a permanent,
Double the number of each kind of counters on
that permanent. {3}:Untap Dimensional Gateway.