Seeking to try and stop the Primal master before they can act, Evelyn reaches out towards it with her shriveled up Hand of Vecna, chanting words of ancient power. Her real eye turn black and her hair starts to float and move as if it were alive, as green energy coalesces around her fingertips, glowing with great intensity, before Evelyn clenches her fist, casting flesh to stone.

DC 19 con save or become restrained.

Amari automatically fails the DEX save (she can't roll higher than a 24); furthermore, her concentration on bless is also lost. She's taken 152 points of damage in rather short order. Sorry, team. 

Both of Wripers attacks strike true, landing two heavy blows against the Arcane Master. A resounding clang emanates through the room as the hammer punches into metallic flesh. 

Amari stumbles backwards, stunned and seared by the onslaught of steel, flame, and magic. People are now no longer blessed. I would say I'm worried for you, but you have heal and mass heal and 50 different healing spells. You'll be fine. 

The shriveled hand of the god of secrets, the divine gift to one of his most devout servants, hums and twitches with power. Calling forth the magic of the arch-lich, Evelyn points at the Primal Master, signaling his time has come. A thin layer of stone spreads out from the masters chest, starting to envelop the hulking titan.

Con Save: 26

Woohoo! The Primal master is restrained. Unfortunately because of the +12 to constitution the Primal master has, it’s unlikely the petrification will be permanent.

Quote from TheFriendlyArchfey >>

Woohoo! The Primal master is restrained. Unfortunately because of the +12 to constitution the Primal master has, it’s unlikely the petrification will be permanent.

 [OoC: True, but if one of us were to -- oh I don't know -- break off petrified pieces, it might make fighting it easier...]

Oh my gosh. The dice luck. Oh. I just read over the stats for this boss. Umm...guess who forget to give the boss ranged attacks? I guess I'll have to improvise

The Primal Master raises their hands, and sluggishly, weighed down by the stone, and sends a bolt of lightning at Evelyn, a peal of thunder cracking in the room. The room is very noisy.

Lightning Strike attack VS. Evelyn: 27 to hit, 41 Lightning damage.

Amelia, GO! (After that is the Divine Master, then Amari)

Quote from Man_of_Dust >>

Amari automatically fails the DEX save (she can't roll higher than a 24); furthermore, her concentration on bless is also lost. She's taken 152 points of damage in rather short order. Sorry, team. 

 *same, basically no dex bonus lol*

Quote from Raccoon_Master >>

Oh my gosh. The dice luck. Oh. I just read over the stats for this boss. Umm...guess who forget to give the boss ranged attacks? I guess I'll have to improvise

The Primal Master raises their hands, and sluggishly, weighed down by the stone, and sends a bolt of lightning at Evelyn, a peal of thunder cracking in the room. The room is very noisy.

Lightning Strike attack VS. Evelyn: 13 to hit, 29 Lightning damage.

Amelia, GO! (After that is the Divine Master, then Amari)

 

 Amelia grins to herself, despite the direct hit fireball that was flung at her, aiming her runic rifle at the primal Master, her arcane cannons each whirring to life with magic as they each aim aswell, pointing towards the divine Master. Her rifle channels magic through it, launching twin bolts of fire at the primal Master with vicious efficiency:

A 22 to hit, and 11 fire + 4 force on first shot

17 to hit, and 15 fire + 5 force on the second.

Her arcane ballistics then fire at the divine master:

First: 23 to hit, and 13 force

Second: 14 to hit, and 18 force

Those rifle attacks should be at advantage. I'll roll those attacks in the Bob sheet real quick. Well, the first attack hit (23 to hit), and the second was a....CRIT! That extra damage is 15 plus 4. 

Both of the rifle attacks slam into the primal master, dousing the storm momentarily with the flaming fury of her gun. One of the ballistas who fired at the Divine Master strikes true.

Divine Masters Turn!

The Divine Master shouts with divine fury at the onslaught of magic, especially the vicious disintegrate. They summon a purple glowing sword, infused with energy. Being near the weapon hurts your head, as if it is messing with your mind. Energy once again bursts outward, bombarding Wripers and Ruin (who has advantage on the save And evasion thanks to fizban's platinum shield) full in the face with Psionic lasers. Make a DC 22 Dexterity save or: 

The Divine Master dives towards the party, making three vicious sword swings with their blade oozing mind energy

Sword Attack #1 VS. Ruin: 30 to hit, 29 slashing plus 7 psychic.

Sword Attack #2 VS. Ruin: 29 to hit, 23 slashing plus 11 psychic

Sword Attack #3 VS. Wripers: 25 to hit, 28 slashing plus 5

Amari, then Kass, then Ruin 

 Also, if you couldn't tell, I've never balanced for level 20 before (who has?) So i'm tuning this fight as we go.

Ooh, a vicious crit on Ruin for an extra 19 slashing plus 3 psychic. Sorry man,

Try that again: 18 plus 6

Dex save: 17 (15 + 2 bonus from cover provided by the platinum dragon shield). I assume half damage because of Evasion.

Con save for concentration on Fizban's: 15

Also... Ruin says 'no thanks' to that critical hit... he casts silvery barbs, spending 1 sorcery point to subtle-spell it on the off-chance something tries to counterspell him. The Divine Master must now re-roll that attack. And the automaton gives himself advantage on his next ability check, attack roll, or saving throw with the other half of the Silvery Barb effect.

Rerolled attack: 18

Ruin summons arcane magic, twisting fate and sowing seeds of doubt in the Divine Masters mind

Amari, GO!

Amari continues to drain herself of her arcane power, hoping to turn the battle in her party's favor. First, she extends a wave of healing to everyone; then, she attempts to remove two of the foes from the battle temporarily.

• Mass Healing Word (bonus action), cast at 9th level, granting 25 hit points to Amari and all five of her mates
• Banishment (action), cast at 5th level, to temporarily banish both the Arcane Master and Primal Master (DC 24 CHA save)

She then steps away from the melee, creating distance between herself and the enemy (movement 30')

Quote from Raccoon_Master >>

Those rifle attacks should be at advantage. I'll roll those attacks in the Bob sheet real quick. Well, the first attack hit (23 to hit), and the second was a....CRIT! That extra damage is 15 plus 4. 

Both of the rifle attacks slam into the primal master, dousing the storm momentarily with the flaming fury of her gun. One of the ballistas who fired at the Divine Master strikes true.

Divine Masters Turn!

The Divine Master shouts with divine fury at the onslaught of magic, especially the vicious disintegrate. They summon a purple glowing sword, infused with energy. Being near the weapon hurts your head, as if it is messing with your mind. Energy once again bursts outward, bombarding Wripers and Ruin (who has advantage on the save And evasion thanks to fizban's platinum shield) full in the face with Psionic lasers. Make a DC 22 Dexterity save or: 

You take 49 psychic damage and are pushed 10ft.

The Divine Master dives towards the party, making three vicious sword swings with their blade oozing mind energy

Sword Attack #1 VS. Ruin: 30 to hit, 29 slashing plus 7 psychic.

Sword Attack #2 VS. Ruin: 29 to hit, 23 slashing plus 11 psychic

Sword Attack #3 VS. Wripers: 25 to hit, 28 slashing plus 5

Amari, then Kass, then Ruin 

 Also, if you couldn't tell, I've never balanced for level 20 before (who has?) So i'm tuning this fight as we go.

 [Well, then that's 82 damage with an automatic Dex fail, since Wripers' Dex can't naturally reach that]

Quick question: are the Masters' weapons themselves magical, or is that additional psychic damage a separate add-on effect?

Anyway, Con save for the second attack to keep up concentration: 19

Kass, hiding in the rear, pokes his head up over the onslaught of attacks going each way.  Seeing the Primal Master start to be overcome by petrification (and assuming he's not banished), Kass will unload a full power Disintegrate at them.  If the Primal Master is banished, he'll cast instead at the Divine Master.

DC19 Dex save, or the target takes 94 force damage

As a bonus action, Kass yells "You've got a lot of moxy, kid - hang in there!" at Wripers, bestowing on him Bardic Inspiration (1d12 and add the number rolled to one ability check, attack roll, or saving throw it makes.)

Quote from Raccoon_Master >>

Oh my gosh. The dice luck. Oh. I just read over the stats for this boss. Umm...guess who forget to give the boss ranged attacks? I guess I'll have to improvise

The Primal Master raises their hands, and sluggishly, weighed down by the stone, and sends a bolt of lightning at Evelyn, a peal of thunder cracking in the room. The room is very noisy.

Lightning Strike attack VS. Evelyn: 13 to hit, 29 Lightning damage.

Amelia, GO! (After that is the Divine Master, then Amari)

 

 Evelyn sidesteps out of the way, the green magical energy flowing around her like rushing wind as she continues the flesh to stone.

Forgot the Celestial!  Kass directs the Celestial to attack the Divine Master again, and to heal Amari and Wripers.

Attack: 26 Damage: 9 radiant damage, plus 9 hp to Amari

Attack: 19 Damage: 15 radiant damage, plus 6 hp to Wripers

The masters weapons are magical constructs created from energy, so they are magic. Most likely, they while fade. Though the claws and teeth and various other natural weapons the masters (mostly the primal one) could be salvaged by a savvy adventurer and made into some sort of weapon.

Divine Power washes over everyone in the room. All the party is overcome by positive energy with the mass healing word. Meanwhile a torrent of magic flows towards the Primal & Arcane Masters, causing them to flicker for a second.

Primal's CHA save: 14

Arcane's CHA save: 25