is it when enkrid first time meeting the knight? isnt that happen after the cult siege? im also kinda forgot

a WILL is a manifestion of a person believe, for example if a person believe, with every single nerves he had in his body, indulges deeply in that believe, he believe in his mind and his own body. without even a single shred of a doubt. that he can cut anything in his path, wether its a metal, a person, a magic even, he/she can manifest a WILL that can cut anything. the problem is, what happen if the metal is boasted as the sturdiest metal in the world by the renowned world blacksmith, what happen if the enemy you faced is not cut by your WILL the first time you used it. what happen when the spell the mage cast is literally a thunder?. are you able to believe it? are you able to kept on believing even when the first one is a failure? without a single shred of a doubt? cause even a tiny bit of a doubt can disrupt your manifestation of a WILL

rem is shamanistic. and the shaman is kinda different with the knight. rem tribe is a natural hunter, thats explain his exceptional fighting skill. but in order to catch up with the knight rem gotta use his shamanistic property. while it looks the same, its vastly different in terms. a shaman using a spirit depending on the battle, if he wish to be like a berseker, invoke a bear spirit, wanna be fast like a wind? theres the eagle. shaman also can specialised in  totem artifact that can do some spell or curses. so while its almost the same in battle prowess, its also different in application

a lot of people misunderstand a knight in this world (myself included when i first read this manhwa, until i read the novel) the emphasis of a knight is a calamity is really appliable here. one of knight property is a WILL. but someone who is having a will might not reach a knighthood. they probably belong to a squire or a junior knight category ( the lady knight who came with a lua gharne fallen to this category). while the heart of a beast seems like a way of a WILL, no it didnt help much for enkrid to understand his core WILL (there'll be another story for that DW), mind you, enkrid is what you call a slow learner, all of this technique his teammate teach him is like a breathing to them. the reason they interested to teach enkrid is, enkrid didnt complaint or fussy about it. some people might learn faster than enkrid, but no one willing to learn until the end. while enkrid, if you show him something that interesting enough for him to learn, he will pester you until he can master it :)) no matter the time and condition. you bored? GO TRAINING!, you just finished your meal? GO TRAINING!!, you just had a duel with your teammate?  GO TRAINING!!!. some godlike being invade your settlement and made you half death? you guessed it, a LIGHT TRAINING! :)). this is why he called the MADMEN btw :))

- Knight    = using WILL. this power system using 2 fundamental, your vow and belief. 
- shaman  = using ancrestal rite to use the power of the ancient
-  mage     = like the usual mage in other manhwa but not that op. mage are someone who prepared before battle. they must add some artifact in                           order to use a big spell so they cant just spam spell wi*** nilly
- clergy     = use their divine energy. there's priest and paladin in this world, idk how priest work to contain their divine power, but the paladin need a                       strong devoutness to g** and stronger vessel to contain the divine power, thats why audin always pray and always train his body

im only explaining it on broader way. i can explain in depth witht this power system. but i think thats a major spoiler? :))
just lemme know if you really wanna indepth of this (there are some power system i left out since its also a major spoiler)

Spoiler text. man, i would like to disappoint you. but enkrid "true" will wont come out until several more arc. but if you truly pay attention, enkrid already has a foundation of his core will . i would like to inform you, in this story, will is pretty much a believe system added by aura. (kinda hard to explain, tho in novel this is what i got). to have a will is to kept your core believe, if it got shaken you will lose it. 

btw, all of his teamate are fcking op. but they also depend on enkrid to become op.

imma add this since its a bit of a spoiler from the novel. enkrid wall is a trial. the purpose of it is to make enkrid despair, or accept his limit, to make him realised that he is just a mediocre people who can't reach a knighthood. as for will, you can say its aura but its more complex, its like a believe system. for example, if you truly believe with every fiber in your body that you can cut someone, you will be able to. now, enkrid himself already got a will (everyone didnt realised it, including enkrid himself) thats why he got can repeat the day if he die basically.