Ra and slifer clash (Avan/duel)

Kotan was in the arena, his duel disk on his right arm. He had his deck in the deck slot, but had not activated his disk yet. He saw a slifer red he had not seen before. He said to him "Hey, do you wanna duel me?"

Avan was walking around the academy. He then went to the arena. Then a ra yellow student ask him to a duel. Sure and what's your name. Avan then stepped on the arena. He then waited for his opponent.

Kotan smiled, and his duel disk activated, the two sides sliding together to form a blade. He picked up the first 5 cards from his deck and said "Kotan. Kotan walker. And your name? And you can start."

Avan activated his duel disk as well. Avan. Avan Sorunto. Thank you. He then drew a card. I summon masked dragon in attack mode. Next I play a card face down and end my turn.

Kotan drew his card and said "I activate the field spell, Mausoleum of the emperor." The field around them became a mausoleum "Now, i pay 2000 life points to call forth red eyes black dragon without a tribute." The dragon appeared in front of him. "I also play my mystical space typhoon to wipe out your face down. Now, red eyes attack. Inferno fire blast!" Red eyes fired a fire ball from his mouth at the masked dragon. "If that works, you will have 7000 life points left. Also, if it works i end my turn."

Masked Dragon was destroyed and Avan's life points went to 7000. I set a card facedown. Next I summon Blue eyes by paying 2000 life ponits. Now attack his Red eyes. Now you should have 5400. I end my turn

Kotan winced and drew his next card. He said "I set this monster face down, and 2 cards face down as well." That was all he could do for this turn.