Mike Oldfield

Indestructible, ha-ha-ha-happy? (When this
creature enters the battlefield, play a Mike Oldfield
song. Pause the song if Mike leaves the battlefield.)
As long as the song is playing, creatures you
control get +1/+1 for every 5 minutes the song
plays for. If the song lasts for 19 or more minutes,
put a horsemanship counter on Mike.
As long as the song is still playing, Mike isn't a creature.