Ludevic, Frenetic Nonbeliever

{2}{u/b}: Exile target creature. If Ludevic, Frenetic
Nonbeliever leaves the battlefield, return that creature to the battlefield under it's owner's
control. That creature's owner creates a
1/1 Spirit token with Flying.
{3}{u/b}{u/b}: Choose any number of Spirits on the
battlefield and exile them. Create an X/X Spirit
Construct artifact creature token with flying,
where X is the number of spirits chosen this way.