Demise, Agent of Armageddon

When Demise, Agent of Armageddon enters the battlefield, you may destroy target creature with toughness 3 or less. Whenever Demise, Agent of Armageddon is put into your graveyard from the battlefield, you may return another creature you control with toughness 3 or less from your graveyard to the battlefield tapped. Whenever a creature you control is destroyed, you may pay{w}, sacrifice Demise, Agent of Armageddon. If you do, destroy all creatures with toughness 3 or less.