Ben Kenobi, Old Hermit

Reach
{x}{u}{t} Search your library for an instant
or sorcery card with mana cost X or less and put
it in your hand. Activate only as a sorcery.
When Ben Kenobi, Old Hermit dies, if he did
not have a Force Ghost counter on him return
him to the battlefield with a Force Ghost counter.
He is now a 0/4 Ghost with Defender in addition
to his other creature types.