Sylveon, Destined to Soothe

When Sylveon, Destined to Soothe enters the
battlefield, if it entered from exile, return any
number of target Eeveelution cards from your
graveyard to your hand.
Whenever a creature blocks or is blocked by an
Eeveelution you control, exile both creatures,
then return them to the battlefield under their
owners' controls.