The Ozora Kyuuden

Whenever one or more creatures you control are put
into exile from your graveyard or the battlefield put
a spirit counter on The Ozora Kyuuden.

At the beginning of combat on your turn you may
have The Ozora Kyuuden become a Spirit creature
with flying in addition to its other types until end
of turn. Its power and toughness are equal to the
number of spirit counters on it.