The Straight Aces

This card costs X less to cast, where X is the converted
mana cost of commander creatures you control.

When this card enters the battlefield, search your library for
a Straight Ace member and put it into your hand.

{w}{u}{b}{r}{g}: Target a Straight Ace member you control and
a Straight Ace member in your library. Return the first to your library and put the second onto the battlefield.

{x}, Sacrifice this enchantment: X target Straight Ace members phase out.