Klein, Traveling Inspector

Klein, Traveling Inspector can't be sacrificed.
At the beginning of your end step, draw a card. Then the next player in turn order gains control
of Klein, Traveling Inspector.
{2}{u}{b}: Klein's controller reveals his or her hand. You may choose a nonland card from it. If you
do, that player discards that card. Otherwise,
draw a card. Only Klein's owner may activate this ability and only once each turn.