Redo: Grimoire System in the Apocalypse

"Well, it looks like I won't have to go looking for you."

Geth heard a strange voice speaking behind him. It sounded unnatural and hateful, almost like it was from another world.

He turned around quickly to see who the speaker was, only to find himself trapped inside of the Boss room's Barrier. 

The speaker was standing on the other side of the Barrier, grinning devilishly at him. It was an extremely light-skinned individual with a very plain face.

Bright red eyes looked at Geth with what seemed like a burning rage. The strange man's teeth were sharp and crooked, a pair of small horns protruded from his temples.

'The man in the black cloak!' Geth instantly thought of the person who had let the Boss free.

"Cat got your tongue, Human?" The creature asked, spitting the word human out like it was some curse.

"No matter. Your words are worth less than the ground you stand on." The creature continued, not letting Geth speak.

"Though, for a human, I have to admit that you aren't as pathetic as the others. This early on, even the best of you should have just recently gotten your first Class."

The creature paused for a moment. Geth was about to respond when he was once again cut off.

"No matter. If you survive this, Albus, I'll be seeing you again."

The humanoid creature then began drawing through the air. Both of his hands drew out Runes so quickly that Geth's eyes couldn't keep up.

A rumbling sound could be heard. Geth turned in time to witness the entire pile of bones beginning to surge up like a tidal wave.

He glanced back at the man and saw nothing but a red puff of smoke as the creature vanished. The smell of sulfur filled his lungs as the smoke swirled past him and into the mountain of bones.

Geth turned again and found that not only were the bones shifting, the previously slain Skeleton Knights and Raised Forsaken had stood up with maximum health.

Even the two Bosses ceased their fighting and turned his way. At once, all of the creatures in the room began slowly striding in his direction.

"Fuck."

The pile of bones hadn't stopped shifting, and he wasn't sure what would come of it. 

'I'm willing to bet it won't be anything good,' Geth thought. 'What the fuck was that thing? I couldn't even see its Level!'

There were over fifty Sub-Bosses and the two Bosses walking towards him right this second. He cast Mass Invocation, swapping the buffs out with Agility and Intelligence.

"All right. You four head to the outer walls before they get too close. Pick them off from a distance, and don't pull any aggro.

Archer, use your Torrent Rain and make sure you hit everything before I kill it. You guys are at least getting some Levels out of this."

The Skeletons sprinted away as soon as he'd finished speaking. A dark cloud enveloped two of them as they ran, making them difficult to see.

'All right, time to get started. Albus, any advice?'

'Don't die.'

'Thanks, buddy.' Geth rolled his eyes and barreled his way into the sea of Bosses before him.

Weapons swung in his direction, tearing into his skin and splattering blood across the ground. 

He habitually cast Restoration on himself. Any wound that he sustained was healed near instantly.

After Geth had dived far enough into the creatures, he began spamming his Mass Invocation Skill. Tremendous amounts of damage was caused as the Sub-Bosses writhed in agony.

Every Undead creature within the spell's range began to fume. Tendrils of smoke erupted into the air, obscuring the incoming hail of arrows that was now falling from the ceiling.

The arrows didn't seem to do much to the Skeleton Knights, but the Raised Forsaken were soon filled with the projectiles.

It didn't take long for the first Sub-Boss to turn to ash. It was soon followed by another, and then another.

Geth's experience skyrocketed as the creatures fell in droves until only ten remained standing. He turned his head towards the two Bosses and the surrounding Sub-Bosses.

It seemed as if some type of Aura was emanating from the Necromancer. It reminded Geth of his own Corruption Aura, and it was almost completely negating the effects of his Mass Invocation.

The damage he was causing was being slowly healed by the Boss' magic. There were only two options.

"Either we cause damage quicker than he can heal, or we take him out first. Which is more plausible, Albus?"

One of Geth's selves asked inside of his mental sphere. Albus seemed to contemplate for a moment before answering.

"It has a very similar build to us. There is no way to kill it while we defend ourselves from the other creatures.

The most we can do is increase our damage output. We are strong against Undead. The disadvantage we have here is that those Bosses have upgraded Classes."

Geth nodded. He knew that this would be a struggle as soon as he saw the Necromancer's Aura. The remaining creatures barreled down on him.

The Skeleton King sprinted forward at an unbelievable speed and struck him across the stomach. Geth skidded back, leaving deep ruts in the stone where his feet had dug in.

He wiped his mouth to find that he'd actually coughed up blood from that strike.

'Note to self: Not all Skeletons are pushovers.'

He charged back at the Skeleton and waited for it to strike. Just as it began to swing its sword, he forced its stance to drop by liquifying the stone below it.

Geth narrowly dodged the swing and brushed past the creature while turning the liquid back into a solid.

'That won't keep him busy for long. I need to take out these Sub-Bosses fast.!'

"Aim for whatever creature I'm targeting!" He yelled orders at his tames.

Geth arrived at the furthest Skeleton Knight from the Necromancer.. He cast Restoration and bashed it with his staff while casting Mass Invocation.