Gandora, Dragon of Destruction

{5}{b}{b}{b}{b}{b} Destroy all cards on every field,
except this card; this creature's Power and
Toughness become equal to the number of cards
destroyed by this effect. This card is unable to
attack for 3 of your turns after this effect is
activated. At the end of your 4th turn after this
effect was activated, exile this card, then every
player discards their entire hand and draws 5
cards.
At the end of each player's turn, unless this card's
effect has been activated, take 5 damage.