Looking to Umber, Tzidon says, “A little help here?  The chest won’t open and now my hands are stuck to it...”

Umber turns to his companion. "Umber could smash. That help?"

Umber hefts his glaive, ready to cleave the chest.

Tzidon shrugs.  "Sure, I guess.  But you better only hit the chest, not me..."

The runes carved into the blade of the glaive pulse with power, as Umber takes aim and swings.

W-H-A-M!

To hit: 10 (-5 to hit for +10 damage: great weapon master feat)

(OOC: That would be a crit! This thing doesn't stand a chance!)

Damage (great weapon fighting style):

4 + 1 + 5 + 6 + 10 + 6 = 37 total on first hit

re-roll 1 and 2: 5 + 1

To hit (bonus attack because of crit): 20 (-5 to hit for +10 damage: great weapon master feat)

(OOC: A 7 likely will miss, right?)

To hit (2nd attack): 16 (-5 to hit for +10 damage: great weapon master feat)

5 + 5 + 10 + 6 = 28 total

TOTAL: 65 hp of magical slash damage 

(I guess I need to do each roll as a separate response because they change when I edit, sorry)

(What did you change in the edit?  Anytime you change an existing roll or add a new roll before existing ones, it'll screw up the results and end up with the manipulated dice flag.  If you remove any changes/new rolls and put htem back to the original state, it should get rid of the flag.  Any new rolls have to go at the end of the post)

(OOC: The end result is valid. I kept a manual, paper count after the first time it changed.)

(Golly!)

In one hit the chest splits into 5 pieces.  A few secones after you are released, you are punched in the back (maybe) Attack: 26 Damage: 24 and again Attack: 9 Damage: 11

Then umber you get punched the the back (maybe) Attack: 11 Damage: 11 and again Attack: 16 Damage: 8

You turn around to see what hit you but there in nothing there. You can't see anything. (If you make an attack it has disadvantage)

"Thanks..." Tzidon starts to say as Umber smashes the chest to splinters, but is interrupted by two blows to the baclk.  "Bloody Hell!" he curses as he spins around and, seeing no one there, slashes at the air in the direction the blows came from, then, with one last look around for their foe, vanishes from sight.

Attack: 18 Damage: 10

(Slip into Shadows to hide as a bonus action, even without stealth or while directly observed, stealth: 23)

(OOC: Yes, one hits; the other misses.)

"Huh," Umber mumbles, aware that someone tried to hit him. "Ouch. OK, I can't see you. That matter not."

Umber whispers something and his glaive glows with otherworld radiance from his branding smite.

Attack 1 (at disadvantage): Attack: 10 Damage: 9

(OOC: That won't hit, so here's attack 2)

Attack 2 (at disadvantage): Attack: 14 Damage: 14

(OOC: Let me know if that one hits, because if it does, I'll get branding smite damage, it should be visible, and I will add a paladin smite, too.)

You both feel resistance as you swing your weapons. Umber only on your 2nd so you can do beandibr smite. And tell me any special affects from it.

Here's the text from branding smite.

The next time you hit a creature with a weapon attack before this spell ends, the weapon gleams with astral radiance as you strike. The attack deals an extra 2d6 radiant damage to the target, which becomes visible if it is invisible, and the target sheds dim light in a 5-foot radius and can’t become invisible until the spell ends. 

So here is the total:

Original damage: 14

Branding Smite: 5

1st level smite: 6

Oops, should have been 3d8, so here's an extra d8: 2

Also, I get +3 weapon damage. If Tzidon is a tiefling, he might, too. See: [ability]Aura of hate[/ability]

So, TOTAL=37 hp and it should be visible.

Umber slashes through this thing and you see the lit up image of a creature that is like mist. It doesn't have a normal body it is just mist with long stubs and eyes glowing eyes. 

Roll initiative

Initiative: 13

Initiative: 13

I also have polearm master feat. Now that I can see what it is, and it is in my threat, I should get an attack of opportunity as a reaction, so here's that:

Attack: 21 Damage: 8

And if it hits, I will add another 1st level smite: 17

With the +3 from Aura of Hate, that's a total of: 26 hp of magical slashing.

And just in case I go first, I will add my attacks to speed things up.

Attack 1: 10 Damage: 12

Attack 2: 26 Damage: 12

Bonus attack (polearm master feat): Attack: 14 Damage: 10

(OOC: Wow, for me, that sucked!)

Umber did go first . So you slash at it and see wisps of transparent cloth fall into nothingness but on your next swing you completely miss and it takes you off balence. But you swing back anyway and loose your footing causing you to fall on the ground. The wisp you attacked hits you while your down, umber. First attack Attack: 22 Damage: 11 and it attacks again Attack: 7 Damage: 10

Then tzidon you feel two more hits from somewhere else. First Attack: 11 Damage: 7 second Attack: 8 Damage: 9 then it is tzidon turn.

On the second attack on umber, he raises his axe up to defend himself and the "hand" on the monster forces it's hand into the blade of umber axe. Now it is tzidon turn.

(If the attacks miss then you don't feel anything tzidon)

Tzidon stabs at the now visible creature with his rapier from where he was hiding in plain sight. 

Attack: 18 Damage: 37