Classy Lounge Stage

When Classy Lounge Stage enters the battlefield,
look at the top seven cards of your library. You
may reveal one Vocaloid artifact from among
them and put it in your hand. Put the rest on
the bottom of your library in a random order.
{6}, {t}, Sacrifice Classy Lounge Stage: Draw X
cards, where X is the converted mana cost of the creature you control with the highest power, then discard 7 cards minus the number of Vocaloid creatures you control.