Curse Breakers!

Bill Weasley forced himself to relax. Only one more ward stood between them and whatever it was that lay on the other side of the sandstone door. Secretly he hoped that the 'whatever' would turn out to be gold or at least a cold drink, but the more cynical part of his brain was expecting another door and more traps and protective spells. Since entering the tomb, they had been forced to pass by at least four such barriers.
'How long, Professor?'
Professor Ceggerson lifted a finger for silence. He had been sitting cross-legged on the floor for the better part of an hour, his dark blue burnoose pulled tight around his travel-worn corduroy jacket complete with elbow patches - the scars of academia. He turned a page of the poorly-bound tome in his lap. A breeze fanned the smoke of the braziers. 'Patience, Bill,' he cautioned, 'the Egyptians were masters of prophylactic magics.'
'Shame they didn't teach my dad a few.'

Bill pulled his wand from the sheath on his boot and then replaced it. Not something you want getting stuck when it's wanted.
The Professor stood suddenly and opened wide his arms.
'Anet' hra-k Teta em hru-k pen aha tha xeft Ra,' he cried in New England-accented ancient Egyptian. His words echoed for a few seconds and then the walls began to rumble as the great stone door rose into the ceiling.
'Open sesame,' Ceggerson added with a stage flourish of his arm.
Bill opened the sides of the lantern.
'Do you think we'll be back before...' His words trailed off.
The lantern had lit the unsealed room and its light now glinted off gold, mountains of gold.
Neither Bill nor the Professor spoke. They stared silently in awe at the piles of jewels, statuary and precious metals that filled the final room. It was the largest single massing of treasure that they had ever seen outside of a Gringotts vault.
'Jackpot.'

The two men grabbed their standard issue backpacks and raced into the room. The Professor slipped on a drift of gems and rolled on the floor scooping at the stones, flapping his arms as if swimming in a sea of riches.
'Sneerscar is going to give us both promotions after this, eh? Or better yet, when we get our cut of this, we'll be able to tell him where to stuff it!'
Bill tried to rapidly estimate the wealth of the room as he filled his rucksack with whatever caught his well-trained eye. After a few minutes he gave up his calculations. The gold extended so far in to the shadowed corner of the chamber he could not see its end. This was no tomb, he realized. It must have been some sort of treasury or storehouse that was lost for millennia.
The Professor had regained his feet and was grabbing up objets d'art and dropping them into his bag as casually as a man going about his weekly shopping. A large golden scarab on a pedestal at the heart of the treasure room attracted his attention. It had lapis lazuli inlay and was marked with rows of fine hieroglyphs. Ceggerson wiped his glasses on a corner of his burnoose and examined the writing.
'Bill, hey! What do you make of this? I've a scarab with what look to be pass-spells on it. Something else, too...' He lifted the scarab to better read the inscription which wrapped around its underside. Immediately he realised his mistake.

Bill had been thumbing through a few scrolls of priceless erotica when he froze - The walls had begun to rumble again. He looked to the Professor who smiled sadly and mouthed the word 'sorry.' They watched as the door began to close and then they bolted.
The entire complex was shaking. The Professor tossed the scarab away and ran back to the anteroom where he tried to relight the braziers. Bill, meanwhile, took up position in the doorway. He grabbed an ornate halberd and tried to brace the great stone slab as it slowly descended but the weapon's ivory shaft exploded into a cloud of splinters.
'Professor! Do something!'
The Professor had snatched up his book and was flipping from page to page shouting spells and counterspells but none seemed to have any effect on the inexorable movement of the stone.
The door was half-closed and Bill had dropped to the ground, back on the floor, pushing his legs against it with all his might. He pulled his wand and cried, 'Immobilus!' but the spell blasted harmlessly against the great rock before nearly hitting him as it ricocheted.
'Professor, now!'
Ceggerson closed his eyes and brought his hand to his forehead.
'Quiet, please! I don't do well under pressure!'
'Neither does my spine!'
Sand began to trickle down between cracks in the ceiling.
Bill let out a groan. It was too late. He dropped his knees and rolled into the anteroom.
'Damn.'
He caught one last glimpse of the room as the door was shutting.
'Accio scarab!' he called and the golden beetle shot into his outstretched hand just as the sound of stone crashing against stone filled the room.

The Professor sighed. 'Now I'll have to get it open again.'
Bill grabbed him by the collar and pushed a bag of gold into his arms.
'Run!' he screamed, shouldering his own pack.
The Professor stared dumbly at the retreating Weasley until a great wave of sand poured from the collapsing ceiling and was followed by the dropping down of an elephant-sized sandstone block. The entire complex was crumbling around them.
The Professor cursed and then he ran like hell.