You will understand in a bit as to why he earns this nick name and how he became truly geared to the ones who knew who he was, and how the ones whom didn't know who he was were terrified of him and how even for a bit he was the whispers of a ghost story of sorts

Bedrock pov

Today was another battle training, except a bit different, most of the groups had turned 8 by now or 7 one or two were still six, so they had started to train us to fight, because slowly we were learning our purpose. But what was interesting to find out was that the guards had kidnaped random dragons from other tribes, maybe one or two nightwings that were sentenced to death but were given the option to fight and maybe earn life without chance of freedom. Most had decided a quick death then a possible slow death then maybe stuck in a cell for the rest of there lives. The fighting pit was somewhere deep into the mountain, witch meant it was extremely hot most were panting trying to cool themselves off or finding the coldest spot in the room and huddling there, except the prisoners whom were miserable stuck in a small cage with no were to go to cool off, the first group was called out as the rest were instructed to watch, about two large sandwings were brought out, they towered over their opponents. They stood close together as if hopping to increase their odds against the guards blocking the only exit, the first group immediately got into their formation as they awaited masterminds whistle to begin, the moment the whistle blew the dragons/dragonets instantly jumped at their opponents, one rolled away in time to see his friends throat get slashed, the other 4 nightwing dragonets disappeared as the fifth dropped the corpse of the sandwings, but the large second sandwing immediately grabbed her by the neck and beat her head into the ground until she was almost knocked out, he lifted her up so the others could see his claws wrapped around her throat, clearly trying to threaten his way out alive,but this did not last long because almost the second he did the largest nightwing dragonet leaped onto his back and slit his throat then went to catch her friend and move her away, she moved fast enough that she had already moved her friend by the time the sandwings corpse finally hit the ground. The on watching prisoners watched horrified as the corpses were dragged away and the group sent out of the pit, next in was Bedrocks group. Bedrocks group trudged in, they all stood on one side of the pit in a line, bedrock stood tall above the rest his face blank as he scanned the 4 prisoners were brought out, 3 icewings and one mudwing all 3 heads taller then bedrock and defiantly stronger and more powerfulthem bedrocks group of 5 But I held my ground as my group got into a fighting position behind me, immediately melting into the dark walls of the room. Master mind sat back down on his ledge witch had slanted rocks to minimize the amount of damage that could be done if he was targeted. The four adult dragons made a circle so they couldn't be snuck up on, bedrock approaches them and flared his wings just a few feet away from them making himself look larger and getting their attention due to the fact of him not having a single silver scales, all heads turned twords him and this was enough time for two to get dragged to the side were two fought the one and left bedrock alone with the other two, he closed his wings and barreled into the first grabbing his horns and yanking them over his own head throwing the mudwing into the wall bedrock turned to the icewing

Switching to the youngest of bedrocks group pov.

Quick blade and I quickly finish off the icewing, we turned to bedrock just as he started to face the icewing, his face blank almost as if it was stone, even when a small bit of ice breath hit his wing he didn't slow a beat, no pain visible on his face as he cracked the Icewings neck, nothing as he ripped out the mudwings throat with so much force he nearly. Decapitated the mud dragon, not a flinch as blood squirted out and landed on his face one even came dangerously close to his eye. He stood their looking over all of us and counted us, I shiver but stepped into the light to be seen by him, we were excused, but he still didn't wipe the blood dripping off his face or clutch the wound he received during the fight, he shoved away the healer from himself and directed her towards us even though he was the only one injured.

(About a week later)

Word had spread about the fight, I heard whispers claiming that he had no soul, or that he only wore a stone mask of scales due to the fact of how tonight and dry his scales were and felt a lot like scales...