
DM Jelani |

Okay, so it takes a full round to disable the trap, in this case it matters who goes into the hallway in what order. So I'm gonna arrange things the best I can understand from what you guys posted and if I misinterpreted tell me.
Rinko goes into the hallway, and Arvid goes in behind her. Arvid is carfully examining things as they go, with Hornan behind him.
Rinko makes it about fifteen feet into the hallway before a piece of the floor she steps on depresses and there is a whirring buzzing noise as two saw blades shoot out from the walls at calf level and sweep a ten foot long portion of the hallway.
Attack on Rinko, Arvid 1d20 + 14 ⇒ (19) + 14 = 33
Damage 2d6 + 7 ⇒ (6, 3) + 7 = 16
The blades slice painfully into both Rinko and Arvid. Searching the rest of the hallway, Arvid finds nothing. The southern door appears to be both unlocked and untrapped.

Arvid |

Arvid was knocked prone too.
While standing up:
You've nothing to be ashamed of. I didn't see this trap either. But for the future: I would propose that I walk in front. My risk is significantly less than yours. My lifeforce is bound to Dareos. If I die, I will come back the next morning.

Dareos |

Let me see your wounds, Arvid
Dareos casts Infernal Healing on Arvid (10 HP over 60 Seconds)
Rinko, should I treat your wounds too?
When Rinko agrees, Dareos casts Infernal Healing on her too. (10 HP over 60 Seconds)
We should come together before we open this door.

Fujiwara Rinko |

"Arvid-kun, I'm not sure I like using you as a shield just because you're from some other dimension," Rinko says looking past his shoulder into the hallway past the door. "It looked like those blades cut you just like they cut me. But I suppose you're a better judge of your abilities than I am. Please lead on when you're ready.
Perception 1d20 + 8 ⇒ (8) + 8 = 16

Arvid |

Perception: 1d20 + 14 ⇒ (18) + 14 = 32
You can trust me. It won't be the first time. But in order to come to something else. I hear some strange rustling sound. Maybe another trap. I'll call you, when it is safe.
Perception: 1d20 + 14 ⇒ (20) + 14 = 34
Arvid looks with a mirror, Dareos gave him, cautiously around the corner. When he sees nothing, he moves cautiously to the next corner and looks around it in the same way. He especially looks for pressure plates or tripwires.

DM Jelani |

Arvid advances cautiously along the hallway peering around each corner with his mirror before advancing. He hears no further sounds, in fact it's eerily quiet, as no one talks. The group gets as far as two turns in the hallway, when suddenly a fanged human skull attached to the skeleton of a giant snake comes writhing silently out of the darkness. It's entwining dance is horrifying and the group can feel dark magic trying to get a hold on their minds.
Everyone except Dareos, DC 15 Will save or be dazed for 2d4 ⇒ (1, 1) = 2 rounds. (mind-affecting, compulsion effect)
Okay, that was the surprise round.
Dareos 1d20 + 1 ⇒ (10) + 1 = 11
Arvid 1d20 + 1 ⇒ (9) + 1 = 10
Hornan 1d20 + 4 ⇒ (4) + 4 = 8
Rinko 1d20 + 5 ⇒ (3) + 5 = 8
Thingy 1d20 + 3 ⇒ (7) + 3 = 10
Initiative:
Dareos 11
Thingy 10+
Arvid 10-
Rinko 8+
Hornan 8-
Dareos can take his round 1 actions now.

DM Jelani |

Knowledge (Arcana) to identify this thing by the way.
Round 1
Initiative 11
Dareos notices that Hornan appears to be staring blankly around the corner.
Arvid's save against the daze? Anyone not dazed can respond to Dareos as a free action.
Round 1
Initiative 10+
The skeletal creature rears back and bites at Arvid.
Attack 1d20 + 6 ⇒ (15) + 6 = 21
Damage 1d8 + 4 ⇒ (4) + 4 = 8 and DC 13 Fort save
Arvid's action, possibly. We'll see how those two saves turn out.

Fujiwara Rinko |

"It's a large skeletal snake thing," Rinko calls back to Dareos. Then in a blur of limbs, she tries to jump and roll past Arvid and the snake thing.
Accrobatics to wind up in the square behind the snake thing: 1d20 + 11 ⇒ (12) + 11 = 23 Need to beat snakey's CMD + 5. Otherwise, snakey gets an Attack of Opportunity and puts Rinko in adjacent square of his choice. Will post rest of my action once we see if this was successful.

Fujiwara Rinko |

Fort 1d20 + 6 ⇒ (11) + 6 = 17
"Shimatta," Rinko hisses as the snake strikes her in the hip and brings her tumbling run to an abrupt halt. "Have to keep you from biting anyone else." As the snake pulls back for another strike, the monk tries to entangle its in head with her arms and legs.
Grapple 1d20 + 7 ⇒ (18) + 7 = 25

Fujiwara Rinko |

As the abomination fights to free itself, Rinko constantly makes minor adjustments to her grip. "You're not getting away that easily, jii-san," she says calmly. Nonetheless, Rinko knows she has to do a better job of controlling the creature before it eludes her grasp.
Grapple 1d20 + 7 + 5 ⇒ (8) + 7 + 5 = 20 (includes bonus for continued Grapple of same target.) Rinko will convert her hold to a Pin if the grapple succeeds.

DM Jelani |

Repost:
Dareos 11
Thingy 10+
Arvid 10-
Rinko 8+
Hornan 8-
Round 3
Initiative 11
Dareos strikes at the grappled snake thing, but fails to hit it as it and Rinko roll about the floor.
Initiative 10+
The creature struggles to free itself from Rinko's grasp.
Grapple to break free 1d20 + 6 ⇒ (7) + 6 = 13
Rinko's grip remains too strong for it.
Arvid's turn, he's no longer dazed.

Arvid |

Arvid makes a full attack
Bite: 1d20 + 6 + 2 ⇒ (2) + 6 + 2 = 10 Damage: 1d6 + 4 ⇒ (3) + 4 = 7
Claw: 1d20 + 6 + 2 ⇒ (3) + 6 + 2 = 11 Damage: 1d6 + 4 ⇒ (2) + 4 = 6
Claw: 1d20 + 6 + 2 ⇒ (20) + 6 + 2 = 28 Crit? 1d20 + 6 + 2 ⇒ (8) + 6 + 2 = 16 Damage: 1d6 + 4 ⇒ (5) + 4 = 9 +if Crit: 1d6 + 4 ⇒ (1) + 4 = 5

Fujiwara Rinko |

Finding a moment in her struggle when both her knees are securely on the floor, Rinko carefully eases some of the pressure on the snake's skull. She lets the thing raise its head a few feet from the ground and takes the opportunity to shift her own weight over her feet. With a sudden twist and a jerk, she attempts to force her opponent's head into the adjacent wall.
Grapple 1d20 + 7 + 5 ⇒ (15) + 7 + 5 = 27 If Grapple maintained, doing Unarmed Damage 1d6 + 2 ⇒ (1) + 2 = 3

Vronim |

Vronim and Klicktak move up to the rear of the group behind Hornan not sure if what is happening ahead he maintains a ready stance hand on the hilt of his Katana ready to draw and strike.
back from vacation and finally catching up (will stay out of this combat since it has already started. updated map as well

DM Jelani |

Round 3
Initiative 8+
Rinko slams the crature's skull into the wall with an audible crack.
Initiative 8-
Hornan shakes the clouds from his mind and levels his musket at the beast, ready to shoot if it escapes Rinko.
End Round 3
------------------------
No you won't. Vronim initiative 1d20 + 9 ⇒ (10) + 9 = 19
Initiative:
Vronim 19
Dareos 11
Thingy 10+
Arvid 10-
Rinko 8+
Hornan 8-
Vronim you're up.

DM Jelani |

Round 4
Initiative 19
Vronim checks out his teammates.
Initiative 11
Dareos strikes a solid blow against the snake thing, chipping off several chunks of vertebrae.
Critical confirmed, extra damage 1d10 + 6 ⇒ (10) + 6 = 16
Initiative 10
The creature continues to struggle to free itself.
Grapple to escape Pin 1d20 + 6 ⇒ (18) + 6 = 24
It thrashes so wildly that Rinko loses her grip. Hornan immediately shoots the beast, knocking more chips from it.
Arvid, your move.