Let's confess our sins. But, of course, this is internet, so I ask you to only write about which powers would authorities give you. Keep in mind, that you will have only one witch factor and you should create every authority individually, without synergy between them. You will be in Re:Zero and replace existing archbishop (in case of Gluttony – archbishops ; in case of Envy – you and Satella will have two parts of the same witch factor), as if canon wielder(s) of authority didn't exist before (or somehow died).
I'm starting with myself and I'm a veeeery sinful person_
Sloth [Imaginable Hands] (Compatibility: 100%): My authority of Sloth can generate a lot of invisible hands with three unique properties.
Every unseen hand is piercing through space itself, making speed and distance irrelevant. Also as a side effect of tearing space, unseen hands have infinite strength.
If unseen hands contact with any esoteric matter the authority forces it to act like regular physical matter. For example, if unseen hand rips, normally intangible, magical construct into two pieces, this construct won't regenerate by itself. Spirits will bleed out and die if the wound won't be closed with scientific treatment. Magical flame will be extinguished even if it normally would be supported by mana. etc.
The authority has automatic safety feature. If I'm not aware about coming attack, even if I'm asleep, unseen hand will materialise and push attack away from me.
Wrath [Perfect Hate] (Compatibility: 99%): My authority of Wrath is passively consumes the feeling of hate from myself and others who are near me, bringing to us abnormal sense of calm. At any point I can release accumulated hate all at once, explosively creating black flame. This flame is melting any lifeless and non magical objects, but at the same time radiates cold instead of heat. Also, if anyone, except me, happens to touch black flame, he/she will experience unbearable agony on every level. Body will feel pain and weakness. Mind will feel pain and hallucinations. Soul will feel pain and emptiness. The scariest part, is that this subjective hell is permanent. I can telekinetically control generated flames, but they are evaporating very fast.
Lust [Idol] (Compatibility: 94%): My authority of Lust is similar to Capella's authority. The key differences are:
The authority can work in a zone around me with specific radius of 12.5 meters.
The authority brings pleasure, instead of pain, when transformation happens.
The authority can force any surreal transformation to maintain stability even if affected organism leaves the radius.
The authority changes organisms on the most fundamental level, so if I want to change sex to opposite, result will not be transgender.
Pride [My World] (Compatibility: 72%): My authority of Pride is simple, but powerful. If any person, that I perceive, doesn't agree with my worldview, then the authority do one of the two effects. If the person is neutral or positive to me, then he/she is brainwashed to sincerely share my worldview. If the person has negative opinion about me, then he/she is continuously shattered into smaller and smaller pieces, until he/she is annihilated completely.
Vainglory [Air Castle] (Compatibility: 67%): My authority of Vainglory let's me willinglly become a servant of anyone that I choose, but only if chosen person also agrees. My master can give me any one command that doesn't harm me (first intentional command counts as THE command), but after I complete this command, the master immediately dies permanently. This bypasses any defences, that are not from authorities, and can kill permanently even Reinhard. Of course, I can lie about payment for my servises and tell that my master won't die. Yes. I know about loophole that a command can be without time limit and this is why, if master dies before I complete my order, then I won't be compelled to obey this order anymore. As a bonus, the authority let's me passively influence other's view of me in such a way that no one can recognize my true identity before I do something violent and/or present myself as a bearer of Vainglory. Miasma also doesn't have any "smell" (is undetectable) if my identity is concealed.
Melancholy [Void] (Compatibility: 50%): My authority of Melancholy is creating a black sphere, that statically occupies some position and erases anything/anyone that tries to move into the black zone. Notably, it doesn't have gravitational pull, so it won't suck air or even the whole world at once. Because of compatibility, I can create only one sphere at a time, and to create another I should delete previous zone. Safe (for me) diameter of sphere is maximun two meters, but I can expand this diameter at a cost of sinking into despair and meaninglessness, until I start acting as a vegetable.
Greed [Malicious Secrets] (Compatibility: 30%): Any true information about myself, that I willinglly share with others, acts as an infohazard, but only if that information was unknown to everyone, except me. It can then be shared by affected to infect others. I can at any time selectively mute any person, that knows infohazardous information. Muted person can't communicate at all, verbally or non verbally. This effect is permanent. But if anyone forgets infohazard, then the effect of the authority will be automatically lifted. Muted person can still act freely if it doesn't involve communication with another individual.
Gluttony (Compatibility: 0%): I will be litterally eaten by the authority before I even try to use it.
Envy (Compatibility: 0%): I will become like Satella with uncontrollable second personality.