The Aspect Thief

Flash, shadow
{2}{u}{b}{g}: Choose target artifact, creature or
land. The Aspect Thief gains that permanent's abilities and types.
{1}{u}: Return target Shapeshifter you control to
its owner's hand.
At the beginning of your end step, if you control
6 or more nonbasic, nontoken permanents with
the same name, you win the game.