Obi Wan Kenobi, Force Ghost

Hexproof
{t}Tap target creature. That creature doesn't
untap during it's controllers next untap step
{1}{t}Put the top 3 cards of your library into
your graveyard, and put the top three cards
of your graveyard on the top of your library.
{2}{t}Return all force ghosts from your
graveyard to your library. Shuffle your library.