Rainbow Dragon

Flying
Cannot use its abilities the turn it is cast.
Must be cast from the hand and can only be cast
for {0} when you control and/or have in your
graveyard at least 7 artifacts with different names.
Sacrifice all artifacts you control: Put two +1/+1
counters on Rainbow Dragon for each artifact
sacrificed this way.
{t}: Exile all artifacts from your graveyard, then if
you do, shuffle all nonland permanents into their
owners' libraries.