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Progo will plant his feet and brace himself (BA Steady Aim) and fire again at the jellie:

3Attack: 24 Damage: 15

 Damage includes sneak

Tharanau let's another ray of ice lose on the monster. (To hit 12 for 1 dmg) He only grazes the edge of the jelly and admires the strength and well timed efforts of Progo. 

Tryncaryn was finally rewarded for his efforts and he managed to pierce feeble defences of ochre jelly consciousness wrecking havoc in its very simple web of neurons. That only amplifies the confusion of the monster, however its torment is quickly and swiftly ended by progos deadly arrow and then its form is still kept for a while thanks to Tharanaus ice spell. You have quick moment to admire that weird thing before it slowly begins to thaw and dissolve.

"Well at least we didn't call the dwarves forward just to send them into another jellie!" Progo decides to forgo trying to save any of the arrows that he put in the cubes. "Keep up with the cold, they seem to not be able to handle it."

“Well I guess we should push forward.” Goraseth then continue through the secret corridor, torch in hand.

investigation : 13

Progo follows behind Goraseth. "Progo wonders why soooo many squishy slimy creatures would be in this place, so close together no less.  One finding its way in, sure, but 3? Progo has a feeling we are going to find a bunch more of them. Progo always wondered where such creatures came from, maybe Progo will find out."

“Maybe a path towards the underdark has been created here. We’ll find out soon enough”

Since the check to spot hidden doors is perception (by the book of this module at least) I will add +2 bonus for Goraseth roll and that adds up to 15. With that roll:

Goraseth picks up the torch that was dropped before when you all started the fight with jellies (i don't remember who dropped it but i had it marked on map that it was there). Checks the corridor, which curves around and ends on the other side of the altar. Then Goraseth doubles down back to check it again and finds another secret doors in the middle of corridor.

"Oh interessant! So many secret doors! Seems like this place is made of it. Come to think of it, Progo, you're right! How do these things even move around? They don't use secret doors? Have they been locked into these spaces as deterrents? How long can a jelly live without prey?"

Tharanau tries to remember what he knows about the lives of jellies and if they could open doors or spot secret passages as well as their feed needs and their reproduction. 
(rolled nature 15 if needed)

"I really wouldn't know. Good questions, Tharanau. It's perfectly possible, though, that the priests left them here as guardians given how possessive they must have been to be favoured by a god of greed." Tryn walks up to Goraseth to assist him with whatever lies behind the next secret door.

"A new set of doors..this is exciting ! Maybe I should have been an archeologist rather than a gladiator." says Goraseth with a big laugh. He then proceeds and push hard on the double doors to open them.

Tharanau knows that Oozes eat or rather devour living creatures. It is unknown how long can an ooze live without eating. Most Oozes are able to squeze trough very small openings.

Looking at this particular situation, you conclude that they were probably trapped here. Since secret doors have very slight slits it appears to you that there was not enough space for those oozes to pass trough any door in here.

I assume Goraseth opens the doors on the east that he recently discovered.

You see a corridor with two doors in half of its length one on southern wall and another on northern wall. At the end of corridor there is a lot of loose rubble. A lot of it.  

Well, before opening door, Goraseth will inspect the rubbles - weapon at the ready for any ooze !
Perception : 22 ! (nat 20)

(Progo should be in with Goraseth just behind him when entering the new doorway)

(Tryn should also enter the corridor. There was a link for the interactive map somewhere, right? Anyone has it handy?)

You do not spot an ooze, but you detect a small draft of air fro behind the rubble, it is very faint. You are sure that can not lead to other entry from outside, but since there is some of the air movement you are under the impression that there might be an open space behind that rubble.

bad crop last time, did not show the corridor.

"There might be something  behind these rubbles. Should we check those doors and then look if we can move the stones ?" asks Goraseth. This small task is bringing him joy for some reason, being an adventurer and walking in dungeons. He heard many stories about famous adventurers that started such like this, who knows, his adventure might start here ?

"Hello? Is anyone there? I am looking for Goraseth and his friends!"

You all hear a woman's voice coming from behind you at the entrance.

Soon you see a wiry older woman with graying dark hair which she wears in a bun. He clothes are worn and functional but fit well and are kept very clean. She wears a gray and blue patched dress. She is unarmed and approaches with a friendly smile.

"My employers have sent me to Phandalin to investigate the news of the dragon and the people in town have told me of your good deeds. I have come to meet you and share news and to see if we could help each other. My name is Rayce."

Tharanau, who had been hanging back, looks towards the entrance. 
"We're here! Please come closer. We're just investigating this temple for the dwarves and clearing it from oozes. They're many and it's hard work."

He wipes the sweat from his dusty forehead. 
"my name is Tharanau, welcome. Who are your employers and what are the news?" 

Tryn, a halfling in a simple robe, peeks around Tharanau to get a better view on the newcomer. "Tryncaryn I'm called. Help is always appreciated! You're welcome to join us, Rayce. I guess the dwarves at the entrance told you about the jellies and that offered us sending stones as a reward if we can drive them out." Tryn pats Tharanau on the back, as he's too short to arrive to his shoulder, and adds, "Tharanau found that they don't agree well with cold and get all frozen up easily and unable to move. This way we can just shoot at them. Hope you brought something to shoot."