Shredded Realm Blight

When Shredded Realm Blight enters the battlefield, all other creatures loose indestructible. Then, destroy X target creatures where X is your
life total. They can't be regenerated.
Indestructible, flying, menace
Creatures can't gain indestructible.
Reveal Shredded Realm Blight from your hand:
You lose life equal to half your life total. Create
a 1/1 black Imp creature token with flying and
deathtouch.