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(i'd just like to point out that you are ignoring a lot of things here,the fire,energy blasts,and electricity)
the electricity however blocked oboros's forarms as they came at rook.ceasing the blast of flame rook ave a harsh laugh"you are a punt force againts my power,you simply dont have the skills or abilities to properly oppose me".the earth then receaded under oboros,went around him and toppled over him burying him alive.rook siezed the exposed tail with his left hand and formed a blade of energy in his right,taking a swing at the tails base intending to cut it clean off.

"then explain why you have been out witted and out matched thus being forced to take the cowards way out of a fix instead of fighting your way out.there were ten different ways to get out of that and counter but you obviously couldnt do any of them".rook replyed"besides,i have abilities that can make it literally imposible for you to exsist,i just like making you suffer and if you truly want to see what i can do then face me in the open where i dont have to worry about the roof caving in."

"aw,i've done so much without even trying,i feel special"rook replyed in a sarcastic tone"and if i'm the stupid one here then why exactly are you summoning up one of the most dangerouse form of an element which i can bend to my will'he added and with a flick of his rist several balls of lave were extraced from the main body of lava and shot tward oboros only to zig zag away from him at the last moment and bounce around until resuming thier previous course from much closer positions.

"now you realize how pitty your power is compared to mine"rook said with a harsh laugh and raised his hands making the lava cover oboros

"oh get yourself out of the muck"rook ordered as he raised his claw sharply and the lava hardended while oboros's head was the only thing exposed"i'm gonna have a little fun here.you know with all those famalies you named i would think you'd have someone to help out when things got a bit"sticky".but then again i supose i scared off any renforcments when i out matched the all powerful magnificent oboros"rook said with a lot of sarcasm at the end.he then kneeled over oboros and transformed back to human form,pulled out his black diamond sword and brandished the flat side under oboros's neck"you ever been tortured before?you ever had nightmares about gruntar vinal's son coming back and turning out to be a half blood then killing you,yeah i can tell you right now that i'm way worse than any of those dreams"rook gave a sinister smile.this was his revenge and he planned to enjoy it.

(magma just like lava can be cooled and hardened,example:the hawian islands,completly made of lava flows.besides,if you dont want him dead i cant really kill him and you have put my characters in situations much less logical than this such as the beam of energy disentegrating which was completly unexplained with out even a feed back beam of a larger mass of energy surrounding and disintegrating it which is sensible.you gave no explanation and i pretty much held my peace.i teknackly cant really kill him besides i'm just tryin to keep the plot going)