This causes a Demiplane to disintegrate it's contents, starting from the outside edge moving toward the center.

Once the Demiplane is empty, it will begin collapsing, losing 1 HP per minute until it evaporates back into the Ethereal mist it was made from.

Affliction [432] 
    Advantage [+3182%] 
        Pressure Support 3 [3] 
            This keeps the air pressure inside constant and 
                keeps the air from rushing out to fill the void 
            This also keeps air from rushing through open 
                planar gates and portals 
            Internal [x1/5] 
        Disintegration [315.2] 
            Innate Attack (Corrosion) 100d [200] 
                Internal [x1/5] 
            Create (Solid) 10 [38.4] 
                Destruction Only [+0%] 
                Cosmic (No Die Roll Required) [+100%] 
                Reduced Fatigue Cost 2 [+40%] 
                Internal [x1/5] 
                Alternate Ability [x1/5] 
            Create (Liquid) 10 [38.4] 
                Destruction Only [+0%] 
                Cosmic (No Die Roll Required) [+100%] 
                Reduced Fatigue Cost 2 [+40%] 
                Internal [x1/5] 
                Alternate Ability [x1/5] 
            Create (Gas) 10 [38.4] 
                Destruction Only [+0%] 
                Cosmic (No Die Roll Required) [+100%] 
                Reduced Fatigue Cost 2 [+40%] 
                Internal [x1/5] 
                Alternate Ability [x1/5] 
    Negated Advantage [+150%] 
        Supernatural Durability [150] 
    Disadvantage [+25%] 
        Dependency (Having Matter Inside, Very Common, Constantly) [-25] 
        The Demiplane gradually shrinks as it loses HP 
    Extended Duration (Permanent) [+300%] 
    Malediction (As Regular Spell) [+100%] 
    Based on Activation Roll [+5%] 
    Affects Insubstantial [+20%] 
    Cosmic (Irresistible Attack) 2 [+600%] 
    Preparation Required (8 hours) [-60%] 
        Meditation inside the Demiplane 
    Only Works on Demiplanes As Old or Younger Than the Caster [-60%] 
    Magical [-10%] 
    Spell Components [-40%] 
        Must say "decay" in Latin 
        Must gesture with hands 
        Must hold something worth at least $1000 from an extinct race, 
            civilization or plane