Wands, the downfall of most HP isekai. They hyperfocus on wands and spells and let their wandless magic to atrophy. For example, a car is faster and more comfortable means of transportation but if you don't take the habit of jogging or hiking, then your leg muscles would waste away
Magic subconsciously strengthens the body. That is why a man can receive a metal ball (quidditch bludger) to the head and not die immediately. It's because majs are more durable than nomajs. They are just too lazy to do physical exercise. That's why very few, if any at all have enjoyed increased strength
I know it's not canon, but I like to think that occlumency is the mastery of your own mind and not just protecting your mind. This covers improved recall and thought speed, parallel thoughts, conscious control of subconscious actions, emotion control, false memories and even secondary ego/ personality. In the same vein, leglimency is the mastery of a foreign mind and not just reading memories. This also covers empathy, hypnosis, subtle illusions, memory rewriting, and even possession
In the comic all mutants have a magical affinity and improved immune systems
I don't know if it's canon or fanon, but you can't be the keeper of your own secret in the fidelis (gotten from fidelity which means trust) charm. Just like how Ridikulous requires laughter and the Patrons pure joy, a vital part of the Fidelis is trust. It's a ritual where you trust someone to bear the weight of your secret on his/ her own soul. Another weakness is that the keeper can't be protected by the hidden secret ie. if a house is hidden, the secret keeper can't live in that house
Is his hemomancy a mutant or metahuman ability? Of so, is this a cross-over?
Low pressure on the moon would evaporate his blood and cause him to burst open from the expansion of his vaporized blood if he's not already dead from having his blood boiled
It's DOV(apex) AH(hunter) KIIN(born). DOV-AH(apex hunter = dragon) DOV-AH-KIIN = dragonborn
Is his sister a Quincy?
The best rule to fight a hollow 1 ."Those who hunger shall lose nourishment" 2 ."Those who are content shall gain nourishment" Hollows are fundamentally hungry. This 2 rules passively drains a hollow of reiratsu and feeds it to the rulemaster 3. "Any loser loses that closest to their heart" If the rulemaster defeats the hollow, he absorbs the hollow's mask and gains a special attribute. If the rulemaster loses, he loses the rulebook
A fullbringer who is a self made man with an independent streak can turn his own self to his fullbring focus
A full bring can connect with the soul of anything. The only reason they are not OP is because more powerful souls(ie most spiritual entities and spiritually aware humans) can resist the connection or even overwhelm them if they manage to connect. A powerful fullbringer can, in theory, overwhelm and subjugate weak hollows. The downside is that it is difficult to make connections. Emotional investment makes connections easier, not possible.
I don't know if it's canon or fanon but I heard that over time,wargs gain some traits of their animals eg. a warg with a bear gains slight increase of strength over time and one with a falcon gets improved eye sight. If a warg pours part of themselves into their animals when warging (the likely cause of cataconic breakdown if the animal dies during warging), can't they purposely drag the essence of the animal back to themselves when returning to their bodies (the animal would likely die as a result) to gain greater attributes of the animal?
Obito had self/short range kamui in his right eye. His dimension phasing ability comes from here too. His left eye (the one with Kakashi) has sniper/ long range kamui. From the name its power is self explanatory. Which version of kamui does Kazuya have?
Stain's speed isn't because of his quirk. Generally, in anime the physical limit for humans is much higher than real life. Stain's physical abilities are the product of dedicated and intensive training
EMS is basically an improved combination of 2 mangekyos. This means that the brothers should gain extra mangekyo abilities from another Naruto character after unlocking EMS. Itachi can import abilities from Sasuke (probably kagutsuchi ie amaterasu flame control), Madara would likely gain abilities from Izuna (were his mangekyo powers ever mentioned?) and Obito can gain Shisui's brainwashing power (I've forgotten the actual name for it).
What bonuses does he get from his titles?