Deep Dark Creepy Cave!- Event plan

Attendees: 2 rpl ~100 characters, one around 160 ish

Fluff:
After stealing a map from a Guard, Valora Vesya leads a group of friends on an expedition to an underground cavern which itself contains a crypt.
The crypt is the home of a rogue oscuri, one that's a budding necromancer though he has not yet advanced enough to raise undead proper. Though the crypts have been boobytrapped with several runes.
They fight through the cave and fight/kill the Oscuri and any minions he may have been able to summon.

Synopsis:

The party arrives at the cave's entrance do their arrival rps etc

The wide mouth of the cave is dark, foreboding etc etc. And very shallow. It only leads down around ten feet before they come to a solid wall. Scrape marks can be seen on the floors and the ceiling next to an unassuming part of the wall.

Once the party has figured out the secret door and entered as soon s they all pile in it will seal shut behind them, activating earth runes to turn the secret door back into a solid wall and making it unable to be interacted with by other magics.

Ahead of them lies A surprisingly well lit corridor with green flame sconces lining the walls which seem to give off no heat. If they choose to examine one it will reveal that it had the feint scent of Rieka to it.

Through a door on the over eand will lead the party to a room with a large pit before them. It is impossible to currently see the bottom but on the other side of the pit there is a door that apparently leads onwards.

Party members will make a /rnd 1 100 check to jump the gap and reach the door. The DC of the roll will be dependant on the party member in question's Agility. Once the door is interacted with a gravity rune will be activated, pushing everyone on that side into the pit where they will softly land on the additional gravity runes at the bottom. If someone was pushed off they will have to roll for an injury.

There's another unassuming corridor and if the party is not careful they will step on a pressure plate, causing all the lights to go out, all except one, far ahead. If they avod the pressure plate or further light up the area they will find an Amulet in a recess in one of the walls.

The light will lead them out into a small room containing the EC, he will monologue and start a battle with the intruders. If the EC loses the first round he will gain Necromancy I for the second round, giving him some summons.

After the fight, the EC will drop his staff, one attuned to Oscuri energies. (The main request for the event.) The EC will not be killed here though, the requester wishes there to be a sequel to this event in the future.

So, the EC will retreat further into the crypt on his defeat. And the runes in the crypt will begin to fade and a distant rumbling can be heard. The EC will lock the party into the room, mainly so that they have a chance to search it and roll for finding loot.

Hidden in the EC's chamber will be a magical ring on one of the raised undead. Also hidden in the room are some bars of Mithril and a small ceremonial dagger. The party will have to search the room to be able to find it. All the optional rewards are well hidden so taht I can have a few things to choose from to give them over the event. If they are thorough and lucky with rolls they could get everything.

A wall at the far end will collapse, allowing the party to escape futher into the corridors. They are on a pseudo time limit here, there will be no consequences for not being fast enough but they will be rushed through.
They come out into a wide chamber deeper underground and they will be locked in the room. A laugh will echo out from a hidden rune and a timer will begin counting down in the air in large, floating letters.

There's a large ticking button in the middle of the room, glowing with the same energy as the letters, surrounded by dangerous looking glowing runes. If someone presses it, the timer is reset. All they need to do to escape is let the timer run out.
Hidden around the room are other runes which, if activated will explode, and if rolled poorly may result in the injury of one of the party members. If the party fails to leave the switch alone then the ceiling will collapse forcing them to be unable to press it as the timer counts down.

Once out of that room, there will be a route that leads to a hatch leading out into the night sky on the praries. It will take a lot of force to open, seeming locked at first. Once open the party has officially escaped and the event will end.

Rewards:

EC's Staff (currently unnamed) -  [Stats]

Optional Rewards:

Amulet of forgotten energies - [Stats]
Gold band of Elemental resistance -  [Stats]
Runic Dagger -  [Stats]
A weapon's worth of Mithril ingot(s)

The EC:
A currently unnamed Oscuri
Their preliminary stats are:
300 vit
80 def/res
100 mcap (250 mcap worth of mana)
Mdam depending on their build (likely around the 200 mark)
During the second round if the EC is being cc chained then he will be given Nercromancy I summons to help body block