Perfect Soul D10 Spells Not Working

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I have a 10th mythic rank sorcerer, gold dragon path. At MR10 you gain perfect soul which has the buff “all spells with less than a D10 damage die use D10 instead” or something to that effect. But I have tried every spell my sorcerer has and they are all still using lesser damage die. Magic missile, disintegrate, hellfire ray, fireball and many more. I am not sure if I am misunderstanding how this should work. It will only let me put one image, so I selected a random spell result, but there are more.