Weapon-Forged Gearhulk

Flying, indestructible, hexproof, menace
When Weapon-Forged Gearhulk enters the battlefield, all creatures lose indestructible until end of turn. Then, destroy all other creatures.
{u}, {t}: You get {e}.
{x}{u}, {t}: You get X {e}.
{u}{b}, {e}{e}{e}{e}, Sacrifice Weapon-Forged Gearhulk: Destroy all creatures target player controls. He or she discards their hand, and his or her maximum hand size becomes 0.