Shulon Gems Of Creation

On entry all Sapphire Shulon, Jade Shulon, Ruby Shulon and Diamon Shulon come under your
control but they come in tapped and won't untap
till your next End Step.
Sacrifice a Sapphire Shulon, Jade Shulon, Ruby
Shulon and Diamon Shulon if you do this create
a Black Opal Shulon which with make a copy of
itself in any end step. Black opals power equals to
the number of Shulon on the battlefield.