User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-77.192.107.58-20191017004825/@comment-95.2.8.245-20191104045311

'Worthlessness' is not a Sacred Gear ability, but a 'Belial Clan' inherited ability. Remember that Raiser Phenex has a limit to the 'Regeneration' ability, the same applies to 'worthlessness'. Because when Issei stubbornly stood up and stood against Rizevim before gaining the power of 'DxD', Dia. Belial was now pushing.