Con check 22 and I'll not use the spell slot.

(No deflect missile Bdaddly? Or was that a higher monk thing?) 

(Ninja'd my edit, missile deflected and returned)

It's the scales. They make me look poofy.

(Sorry computers been crap, doing this on my phone. I'm with this now lol)

Morthos will attack firing 2 arrows into the darkness hoping to hit sometgins or at least distract for a second:

Attack: 19 Disadvantage: 17 

Damage: 10 

Extra Attack: 15 Disadvantage: 25

Damage: 9

Morthos will then try to get out of the Darkness and will run off the glacier ledge (7ft right?) And will just catching his breath and attempt to go unnoticed stealth?: 10

(Sorry I had to fix a roll because it had the aronw / so it didn't show up)

(I assume since Gell was closest those were aimed at him? If so, the second hits assuming those rolls are correct? For now, I putting forward the reaction for moving away.)

If Hit: Conc. Save for Darkness(DC 10): 20.

Reaction: Gell Casts Booming Blade with the Warcaster Feature.
To Hit: 19 For: 11 bludgeoning and thunder damage plus an immediate 9 thunder damage for moving. 

(Lucky Duck. Can't beat anything higher than a 20, so not gonna bother.)

Tundra: (Round 3)

Morthos quickly releases two arrows, and manages a hit, but as he tries to slip away Gell catches him with his hammer, releasing a thunderous boom. Morthos is wreathed in energy that would hit him if he moved, but he isn't moving... [Edit:] As he slips away Morthos takes a swing, but doesn't get a piece of his target.

(If fixing your rolls improves your results, let me know. You won't be able to cover your position in the same turn you attack.) 

(Gell, Jianyu)

Arena 6: Frozen Tundra

  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P
16  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
 ===================..%=====%..==================
15  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
 =........€........ΩΩΩΩ........ΩΩΩΩΩΩΩ...........
14  .  .  .  .  .  Ω  Ω  .  .  Ω  :  Ω  .  .  .
 =..ΩΩΩΩ........ΩΩΩ::::ΩΩΩΩΩΩΩΩ:::::::ΩΩΩ........
13  Ω  Ω  .  .  Ω  :  :  :  :  :  :  :  Ω  .  .
 =..Ω:::ΩΩΩ..ΩΩΩ:::::::::^^^^^^^:::::::::ΩΩΩ.....
12  Ω  :  Ω  Ω  :  :  :  :  :  :  :  :  :  Ω  .
 =..ΩΩΩ::::ΩΩ:::::::@@@@@@@@@@@@@@@@@:::::::ΩΩΩ..
11  .  Ω  :  :  :  @  @  @  @  @  @  @  :  :  Ω
 =ΩΩΩ..ΩΩΩ:::::::@@@@@@@@@@@@@@@@@@@@^^^^:::ΩΩΩ..
10  Ω  .  Ω  :  @  @  @  @  @  @  @  :  :  Ω  .
 =€::ΩΩΩ..Ω:::@@@@@@@@@@@@@@@@@@@@:::::::ΩΩΩ..ΩΩΩ
09  :  Ω  Ω  @  @  @  :  :  :  @  @  :  Ω  .  Ω
 =:::ΩΩΩ..Ω...@@@@@@..^^^¥^^^..@@@@@@...Ω..ΩΩΩ:::
08  Ω  . ZΩ  :  @  @  :  :  :  @  @  @  Ω  Ω  :
 =ΩΩΩ..ΩΩΩ:::::::@@@@@@@@@@@@@@@@@@@@:::Ω..ΩΩΩ::€
07  .  Ω  :! :! @  @  @  @  @  @  @  :  Ω  .  Ω
 =..ΩΩΩ:::^^^^@@@@@@@@@@@@@@@@@@@@:::::::ΩΩΩ..ΩΩΩ
06  Ω  :! :  @  @! @  @  @  @  @  :  :  :  Ω  .
 =..ΩΩΩ:::::::@@@@@@@@@@@@@@@@@:::::::ΩΩ::::ΩΩΩ..
05  .! Ω  : L:  :  :! :  :  :  :  :  Ω  Ω  :  Ω
 =.....ΩΩΩ:::::::::^^^^^^^:::::::::ΩΩΩ..ΩΩΩ:::Ω..
04  .! .  Ω  :  :  :!J:  :  :  :  Ω  .  .  Ω  Ω
 =........ΩΩΩ:::::::ΩΩΩΩΩΩΩΩ::::ΩΩΩ........ΩΩΩΩ..
03  .  .! .  Ω  :! Ω  .  .  Ω  Ω  .  .  .  .  .
 =...........ΩΩΩΩΩΩΩ........ΩΩΩΩ........€........
02  .  .  .! .! .  . S.  .  .  .  .  .  .  .  .
 ===================..%=====%..==================
01  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
   A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P

Key: '=' High wall (8ft.), 'Ω' Glacier Ledge (7 ft.), ':' Glacier Surface, '@' Ice (difficult terrain), '^' Ice Spikes, '€' Frozen Tree, '%' Door, '.' Dirt, 'A-Z' Contestants

( S Z vs. L J ) 

(No I want to fly up and out of the reach of mid range spells. Probably like 65 feet up)

(I hit with a 15? Yay! I think.)

Gell lets out an Orcish curse. Then a thought comes to him. He lets out another raspy chuckle.

"Close one, but not enough."

Gell climbs up the ledge at D-5, takes in the scene, then traces a line in the air with his hammer. Where the hammer passes, motes of darkness solidifies and change to motes of light that streak towards Morthos and Sarah both. The greatest number of which head straight for Morthos.

New Position: D-5

Action: Gell Casts Booming Blade upon Sarah.
To Hit: 24 Damage: 7 bludgeniong and thunder damage. If hit, the target suffers an additional 6 thunder if willing to move before the start of Gell's turn. 

"Run, if you still dare Sarah. But don't expect to get far. Right, Jianyu!" 

Intimidation: 18 at Sarah. 

(Edited as discussed below post.)

"Dig. Deeper." 

He commands and attempts to strengthen the bolts mid-flight. 

Action: Gell Casts [1st Level]Magic Missile and aims 2 darts for Morthos and 1 for Sarah, inflicting 3 times 2 plus 5 for a total of 13 points of Force Damage on Morthos.
For Sarah, it is 4 plus 1 for 5 points of Force Damage (DC 10 Conc. Check).

Gell Spends 1 Sorcery Point to Empower the Spell, re-rolling for 4 instead. 

Quote from EisenK1NG >>

(No I want to fly up and out of the reach of mid range spells. Probably like 65 feet up)

(This will still put you 50 feet into the toxic fog.)

Quote from Mehmen >>

(I hit with a 15? Yay! I think.)

 (Nope, sorry for my error. That was not a hit.)

(The 24 would hit =P )

(Edit above. Do you wish to keep your stated action?)

(Only if he's no longer visible following that stealth roll. As stated before, can't even meat anything above a 20. :P)

(If he is however, Gell would've climb onto the ledge by G4 to get the angle, and cast Magic Missile at both Morthos and Sarah if possible. If not possible, then just on Morthos before moving to Sarah.)

(Morthos is unable to hide without the use of his action. Both Morthos and Sarah are visible from D-5)

(Okay. That works. Editing Original Post to reflect this.)

(Done. Maintaining position at D-5.)

Intimidation contest 13 Con save 12

(Ooooooh. Well which spaces aren't taken up by snake?)

Tundra: (Round 3)

Gell hits Morthos and Sarah with a burst of arcane energy. Morthos falls. Sarah keeps her concentration.

Jianyu Emerges from the blackness to strike At Sarah, hitting
10 for 6,
16 for 6,
11 for 8, and
8 for 9 with a Flurry of Blows. [Edit: wrong dice]

With the first successful hit he'll attempt to stun her. (Con save DC 10, also Concentration DC 10 ×4)

(Advantages if applicable. 15, 25, 19, 26)

(Flurry of Blows Damage: 10, and 9)

Sarah endures the attack, though she finds Gell fairly intimidating. (Effect: 3, She cannot benefit from advantage against Gell to overcome disadvantage this round.)

(Sarah. Morthos is unconscious)

Quote from EisenK1NG >>

(Ooooooh. Well which spaces aren't taken up by snake?)

(The one you're in, the one Toren's in, and a few others. All spaces within this area are in Grianne's reach. You can flee into the fog, or hide in the fog, but, if you begin your turn completely within it, you will suffer damage.)

(Well damn if I knew the fog was above me I wouldn't have spent the last few turns trying to escape upwards and risking opportunity attacks...)

Tower: (Round 17)

Baryk breaks free again.

(Round 18)

Grianne tries to grab him again, but doesn't get a piece of him.

(Toren)