As the boss started to unleash his attack Arina had an arrow drawn back and ready to go. Just before she went to release it Shishirou came out of nowhere and grabbed onto her arm, effectively knocking her out of her concentration which sent her arrow flying in some random direction. Missing its target. 
[color=red]"Ack-what are you doing?!"[/color] She called out at first. The initial jolt from the sudden grab made Arina forget about the coming magic pulse. Time seemed to slow down again as she looked over to the Boss when he unleashed the magic blast. 
Arina wrapped her arms around Shishirou as well as she tried to cover both of them from the blast. Shishirou was holding on for dear life it felt like, it must have felt the same for her. She didn't even realize she was holding on that tight. 

Once the dark magic faded and they were safe and neither her nor Shishirou took much or any damage. Arina let out a soft sigh as she watched Shishirou prepare for another charge at the beast. She also looked past her and saw all of the tanks and DPS players who couldn't block the blast effectively stand back up. She didn't see any more dead players so that was a good sign. 
[color=yellow]"Give it hell too, Arina-chan!"[/color]

That comment made Arina's ear twitch slightly and she sent a smile to the back of Shishirou's head as she ran off to attack the boss. "You bet." She said to herself as she drew another arrow back and took aim to let it hit her mark. 
As she was doing this she noticed something else. Now, she was sure she wasn't the only player that noticed this either...but one player appeared to be wielding the boss weapon and using it against him? Either that or Arina was just dreaming. Seeing that sight made Arina stop and just watch as the player took the cleaver and carved out a rather large chunk of damage from its health. 
Wait a minute...that player was a part of the same party as she was! She couldn't help but smile at his creativity. She was sure that weapon was a drop from the boss, but he wasn't dead yet so whatever worked.

Now that the mass of decaying bodies was weaponless he was now on a different attack pattern. While the tanks continued to attack the boss and cause small damage something happened. The boss slowly lifted his giant caged head from looked at the tanks and DPS players directly below him and he looked off towards the back of the dungeon. He was looking right their healers. 
As if his AI knew what was going on. 
The boss let out another angry bellow which stagger another few players before he used his chained left arm to sweep players away in an arc. If one was caught in that arc they were effectively knocked back.  But he wasn't finished. Next one of the tanks he hit with that arc for some reason drew his aggro and he moved over to where he lay on the ground and brought his left arm down in one massive punch. The player died of course, the boss still had no aggro on the tanks near him and instead he swept his arm in another arc, sending those who were trying to recover flying back even more. This time three players were killed as their bodies were thrown back into the dungeon wall. 

The mage leader from before entering the boss room watched in horror as this was happening. She was angry now. Obviously she was going to take her anger out on the tanks. 
"What are you doing?!" She screamed in anger at the tanks by the boss. "Hold his aggro! This boss isn't hard at all!" 
While it was true this boss was rather easy, something was wrong. His AI was...not wanting him to die. That might sound odd, as all boss and enemy AI would be like that. But it was as if the Boss knew what was at stake if he died. 
But if what just happened wasn't bad enough, the Boss was still not finished. 
He then shifted a rather quick glance back at the small group of healers who weren't paying attention to the boss but instead the various red and yellow health bars they had to get into the green. 
The boss raised his left arm and that same dark magic started to form on his body fingers. After a few seconds he slammed his hand into the ground and a small portal of dark magic just big enough for his hand to fit through was carved into the dungeon floor.
Even though the boss was still taking damage he was just simply ignoring the tanks trying to hold his aggro. Which was something he wasn't supposed to do. 

The tank leader knew what was going on. He was baffled at this whole thing. He had fought numerous bosses but nothing like this had ever happened. He heard the comments made by the other leader and simply put an agitated look on his face. [b]"Something's wrong!"[/b] he shouted loud enough for any player to hear him. He hoped the mage who called his fellow tanks out would hear that and see what he was talking about. 

Now then, the attack. Just as one could guess that same dark portal formed right under where the healers were standing and not but seconds later the large grotesque hand burst from the portal with such force, knocking the majority of the healers flying. Only about two of them were killed by the initial blast, but that's two healers down. 
After the portal closed the remaining healers kept trying to stand but they couldn't. Now the boss shifted his aggro back to the various tanks at his numerous feet. 
Only about three healers were able to contribute to the team the others were stuck on the ground, holding their eyes in pain. They had that same dark energy seeping from their eyes and it was blinding them. A status ailment notice popped above the affected healers' heads as well as by their names. "We can't see!" Or "I can't see! Purify me!" Or simply "Purify me!" Were all that the healers were saying. 
The boss seemed to let out a low chuckle as his job was done well. 

The surviving mages now had to make a choice. They could either continue healing the tanks and DPS players or they could purify their fellow healers so they could get back into the battle. But purifying would take some time...and what if another..thing happened! 
The boss reached his arms back and let out another low bellow but this time his bellow was interrupted by a sort of..glitch sound. As if someone had taken his sound and skipped a segment of the audio. He repeated the bellow and it was fine that time. His moveset was unaffected however. 
Next he brought his hands down in front of him on whoever was holding his aggro. He seemed to be back on his regular AI pattern. Slow and stupid. His health was very low. They needed to end this quickly due to their low amount of healers. The three or four healers who were still up and running were all tirelessly spouting spell names over and over again as they tried their best to keep HP bars up. It was a noticeable difference in healing. 

Arina had no idea what just happened. She was near the back at this point with a few other archers and mages as well as the healers. She decided to move up somewhat, all the while she was shooting arrows into the boss. She had never fought this boss before but she had a feeling something was up. Either that or this boss was had a super peculiar AI. 
The archer activated another skill and drew back her arrowless string and then three bright pink arrows with very broad tips appeared. Her adrenaline was pumping as this was way more action packed than she was expecting. She was able to calm herself enough to focus her shot and let her arrows fly. These broad bolts penetrated deep into the flesh of the Boss, causing slight bleeding. 
His HP was very close to be depleted. They had to end this.