Can a Human Variant start with stacked proficiencies?

So the Human Variant in 5E D&D gets two different ability points, proficiency in one skill and a feat.

Let’s say that human is a cleric with acolyte background. He takes a double dose of religion (Am I wrong in presuming you can do this?), then the proficiency in religion and then the “Skilled Feat” with one of the three skill as religion, can they stack and how?

Can a living character (IE. Human NPC) become a contruct (IE. Warforged) via a soul/host transfer?

Im making a pseudo doctor character (Player or NPC), and would like to know if I can link a living characters soul to say, a vacant warforged body so that if the entity dies their soul would go into the Warforged and take it over. Is there any spells that can do anything like this in official D&D? If not, do you think something like this would be too outrageous for home-brew? The goal is for the person to retain complete autonomy, so Necromancy is prohibited.

Where are field names of decoded human readable X.509 certificates specified?

The ASN.1 module for X.509 certificates as specified in RFC 5912 – Section 14 is as follows:

TBSCertificate  ::=  SEQUENCE  {       version         [0]  Version DEFAULT v1,       serialNumber         CertificateSerialNumber,       signature            AlgorithmIdentifier{SIGNATURE-ALGORITHM,                                 {SignatureAlgorithms}},       issuer               Name,       validity             Validity,       subject              Name,       subjectPublicKeyInfo SubjectPublicKeyInfo,       ... ,       [[2:               -- If present, version MUST be v2       issuerUniqueID  [1]  IMPLICIT UniqueIdentifier OPTIONAL,       subjectUniqueID [2]  IMPLICIT UniqueIdentifier OPTIONAL       ]],       [[3:               -- If present, version MUST be v3 --       extensions      [3]  Extensions{{CertExtensions}} OPTIONAL       ]], ... }  

The field names are the same in RFC 5280.

The decoded example certificate on the X.509 Wikipedia page however has completely different field names:

Certificate:     Data:         Version: 3 (0x2)         Serial Number:             10:e6:fc:62:b7:41:8a:d5:00:5e:45:b6         Signature Algorithm: sha256WithRSAEncryption         Issuer: C=BE, O=GlobalSign nv-sa, CN=GlobalSign Organization Validation CA - SHA256 - G2         Validity             Not Before: Nov 21 08:00:00 2016 GMT             Not After : Nov 22 07:59:59 2017 GMT         Subject: C=US, ST=California, L=San Francisco, O=Wikimedia Foundation, Inc., CN=*         Subject Public Key Info:             Public Key Algorithm: id-ecPublicKey                 Public-Key: (256 bit)             pub:                      00:c9:22:69:31:8a:d6:6c:ea:da:c3:7f:2c:ac:a5:                     af:c0:02:ea:81:cb:65:b9:fd:0c:6d:46:5b:c9:1e:                     9d:3b:ef                 ASN1 OID: prime256v1                 NIST CURVE: P-256         X509v3 extensions:             X509v3 Key Usage: critical                 Digital Signature, Key Agreement          ... 

Signature Algorithm instead of algorithm, X509v3 extensions instead of just extensions.

Since the certificate has version 3, i would assume it doesn’t have anything to do with the version…

Of course i searched for various field names like X509v3 Key Usage or X509v3 CRL Distribution Points but couldn’t find any reference.

So where are the field names of the decoded human readable X.509 certificate specified or mapped?

Can a non-magical human deal with flying targets without projectile/thrown weapons?

Say that for whatever reason, a martial character can’t use any projectile (sling, bow, etc.) or thrown (javelin, bloodstorm blade’s Throw Anything, etc.) weapons.

The whole region is also covered in a constant antimagic field, so supernatural attacks like the fan the flames maneuver won’t work (not that 30 feet is really going to counter most flying enemies), nor will a potion of fly or a magic sword with some sort of ranged special ability. It would also be a waste to take a spellcasting class and become a dragon disciple, since this is a martial character, and they live in an antimagic field.

And obviously the character isn’t of a race that has a fly speed of its own, because that would make it a non-issue. Let’s say they’re human.

Is there any way for the character to attack flying enemies (especially flying, ranged ones) from the ground, or bring the enemies down to the ground, or bring themselves up to the enemies in the sky (who we can assume are beyond any reasonable jump check and aren’t dumb enough to hang out near climbable walls)?

I’m expecting that this will rely on extraordinary class features or feats (which we’ll say are all available, unless they have a magical/non-human prerequisite), but there could be some other type of solution, I dunno. (Not 100% sure on the tags because I don’t know what sort of features will work)

Can a Human Disguise Self into a Grung?

I want to pretend I’m the grung goddess Nangnang, and I thought of using Disguise Self to make that illusion. My party will support me with Daylight, Minor Illusion, yelling Grung phrases into a horn that amplifies and distorts them, Fog Cloud and a Griffon for a stylish landing, and an invisible Imp touching the Grung King as I pretend to touch him from a distance (to avoid physical inspection).

Disguise Self states that

You make yourself look different until the spell ends. You can seem 1 foot shorter or taller and can appear thin, fat, or in between. You can’t change your body type, so you must adopt a form that has the same basic arrangement of limbs. Otherwise, the extent of the illusion is up to you.

Now, Grungs are fairly different from regular humans, but they are still humanoid, have similar limbs, etc. I would become a very big Grung, but that is to be expected, I’m a damn Goddess! Is this plan feasible?