Senlin, The Sleeping Walker

Flash, Shroud
{t}{w}{u}: Target creature gains Spirit in addition
to other types and gains "When this creature
becomes the target of a spell, exile this card and
return it to play under its owners control" until
end of turn.
{3}{w}{u}: Exile Senlin, The Sleeping Walker then
return her to the battlefield transformed under
her owner's control. Activate this ability only
any time you could cast a sorcery