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* [[Grace Extractor|Grace extraction]] – In this state, without Jack's grace to maintain a balance, Jack's angel and human halves begin attacking each other, resulting in Jack becoming fatally ill.<ref name="fourteen07" />
* [[Ma'lak Box]] – The box was able to temporarily inhibit Jack's powers, but through extreme concentration and will power, Jack was able to escape and destroy the box.<ref name="fourteen19" /> Given that the box was capable of holding even the most powerful archangel, it would be incapable of containing Jack completely, as he would grow to become more powerful than an archangel. The Winchesters believed that Jack "leveled up" when he broke free from the box.<ref name="fourteen20" />
* Potions – Through feeding him multiple smoothies containing yarrow root and ground jawbone, [[Mrs. Butters]] was able to weaken Jack's powers.<ref name="fifteen14" >[[15.14 Last Holiday]]</ref>
* [[Warding sigils]] – With strong enough warding, Jack's powers can be nullified.
