Sorry that's a wisdom save for the first one! not INT its an Int save for the second. Also the dragon isn't blue It's a black dragon made of shadowy goodness.

{It's okay, and not gonna lie the dragon sounds pretty cool all things considered.}

Nikolai's Wisdom save-22

{If he passed the Wisdom save}

Nikolai's Intelligence save-17

{If he failed the Wisdom save}

Nikolai's Intelligence save- 18

Not sure if the rolls not showing but tha damage is 36

{Yeah, it wasn't showing...}

"A dragon? What are you..." Nikolai trailed off when he was hit with the breath attack. A faint string of curses escaped his lips and he glares at the young man with a somewhat annoyed expression. "You're clever, but I won't fall for the same trick twice." The Warlock shook his head slightly before using Eldritch Blast.

Attack: 26 Damage: 9

Attack: 24 Damage: 13

Attack: 22 Damage: 8

Attack: 18 Damage: 4

yeah those all actually hit him

Con saves: 47 

Assuming dragon is still up: 23

Oz will move 30 feet closer a frown on his face. "I'm full of tricks you don't know what I'm capable of." 

15 luck point for the fail

Quote from Shadowmasterg6 >>

12 luck point for the fail

 You don't make saves against eldritch.

A faint hiss escaped him as he was hit again. "I never would have expected a dragon... but this is fine." He thought aloud as he shut his eyes for a moment. When he opened them he noticed that he had gotten a little closer and a plan started to form in his mind. "Good, I would be disappointed if you only had one. And I also have a few tricks up my sleeves, although I had hoped not to use this one so soon." Nikolai replied before shifting his glance slightly, pulling something that looked relatively like a pickled octopus tentacle. He mumbled something under his breath as a 20-foot-radius sphere of blackness and bitter cold beings to appear 5 feet in front of Oz. 

Action- Nikolai casts Hunger of Hadar: The void creates a warp in the fabric of space, and the area is difficult terrain. Any creature that starts its turn in the area takes 4 cold damage. Any creature that ends its turn in the area must succeed on a DC17 Dexterity saving throw or take 7 acid damage as milky, otherworldly tentacles rub against it.

Oz is gonna go ahead and counter spell that. What level is it so i can mark it off my sheet?

Concentration checks)

{It's at 5th level}

Oz moves 30 feet closer. (Is 90 feet away)

He raises a hand and a small sphere of pure blue energy focuses in his hand. Chromatic orb: Attack: 19 Damage: 20 Lightning damage.

Dragon damage (Int save 19 or take half): 22

Nikolai's Intelligence save-18

Nikolai let out an annoyed growl and against his better judgement he moves forwards 25 feet. Then he casts Eldritch Blast again.

Attack: 25 Damage: 9

Attack: 12 Damage: 12

Attack: 29 Damage: 13

Attack: 24 Damage: 13

(those all hit)

Con saves: 52

If dragon is still up save Int 19 for half or take: 33

*The wizard staggers forward the last 5 feet* "I'm sorry i think your magic was phenominal but I think it is time for this charade to end." 
He points a finger and a beam of green light blasts  from it. You need a DEX save(Dc 19) as this spell is a 9th level disentigrate. I'm going to tell you right now. You will fail this save, Damage: 103

As the beam of green light hits Nikolai was turned into a pile of fine grey ash.

{He only had 42 hit points left.}

Oz hangs his head sadly. "Don't worry my friend. You will not be gone long." *He stoops and collects the ash and places it into a component pouch* 'I'll wish you back tomorrow and I'll take you out to dinner for your troubles." *And with that Oz exits the arena with tears dripping from his eyes*

Wow. That was pretty cool. I’ll do the next in a minute. 

11
7

Ok! The next one is Oz vs 

Paladin: Victor (Mattrfagan8)

Init: 22