The Ur-Dragon, Compleated

The Ur-Dragon, Compleated is all colors.
Double Sunburst (This enters the battlefield with
two +1/+1 counters on it for each color of mana spent
to cast it.)
Flying
Whenever The Ur-Dragon, Compleated attacks,
draw cards equal to its power, then you may put
a permanent card from among them onto the
battlefield, it enters as a Phyrexian Artifact in
addition to its other types.