fighting the elite goblin?

Heiwama and his party had entered the forest, it had a strange atmosphere not something that you would expect from a place where mostly goblins live, but they didn't take notice to it and moved on further into the forest, eventually they found the highlighted place on the map where the elite goblin was supposed to live only it was suprisingly quiet, no sounds of goblins no smoke from a campfire, just complete silence they slowly approached the camp waiting for a sudden suprise attack, but then they saw the reason why it was all silent, dead goblins everywhere their hearts ripped out of their chest, and in the middle was a black shadow feasting on the elite goblin, Heiwama froze and his party members did too, this was the infamous soulshadow a b rank monster that could defeat an a rank party if they did not posses holy magic, and even though Heiwama did posses it he knew he didnt have the capacity to defeat this thing but atleast he could hold it off so his party members got the chance to escape, and so he told them to run i can hold him off he said but instead of following  his orders they stayed beside him knowing he wouldn't make it out alive if they left himt there so they charged forward all three of them and attacked the soulshadow, as expected however they cut right through it without dealing any damage, but it did give Heiwana enough time to cast a holy magic spell that would atleast deal around a quarter of his health, but right as he was about to activate the spell it got cancelled, the shadow had cancelled the spell unknown to them this soulshadow was actually one of the strongest of his kind being around a rank and being able to cancel magic, Then despair hit realising that they didn't have a chance with this monster they tried to flee but their bodies wouldn't let them frozen in place all eyes on the shadow and then, it started talking: Hello humans welcome to what i call my domain you guys have a decent party i see, so much room for improvement! too bad i have to kill you now.. the soulshadow attacked slamming into acheri she got flung up into the air without any way too defend herself, then he went after mamoru cutting of his ear and then, he made his way up to Heiwama, Now YOU the strongest in your party i assume, strong with sword and magic, impressive if you would allow me you would make a fine undead i might even make your friends one too, BAM heiwama got hit, he felt the bones in his body crack he felt blood running down his spine, he tried to get up but he got punched again and again but then something switched, his body started to regenerate and before he knew it he was starting to produce an advanced holy magic spell, before the shadow could react he had already slammed it into him NO NO HOW COULD THIS BE y- y your just a d rank adventurer, im the STRONGEST OF MY KIND and then Heiwama dealt the final blow with the last piece of mana he had, after that everything went dark.