*A low rumble echoes all around you, deep and reverberating. Your stomach sinks as if in answer to it.*
*The faint rustle of leaves and undergrowth can be heard ahead, followed by frantic scraping and skittering.*
*The dry sound of a snapping twig, followed by utter, unnerving silence. You feel as if the forest is holding its breath around you.*
*A half-gnawed bone, bleached at parts and blackened at others, stands out right in front of you. Whether set thus by chance or malice, you cannot tell.*
*The air grows cold around you and a prevailing sense of frost makes your limbs weary and heavy. Your senses scream silently; this is not the way things should ever be!*
*Shimmering sheens of furnace-hot air blast your face abruptly and your skin howls in protest at the sudden abuse.*
*The reek of pungent acid pierces your lungs, much like a sharpened, murderous dagger. Even breathing becomes a labor.*
*Your eyes are abruptly deprived of the world around you. You find yourself suddenly swimming in a sea of darkness.*
*A half-shredded boot gapes emptily at the path in front of you.*
*Ancient stairs, brittle and worn with the passage of time, croak in protest as weight is put on them ahead of you.*
*A deafening roar imposes itself on everything else; the very earth around you trembles and quakes. A mighty shadow engulfs you!*
*Shrill, maniacal laughter echoes ahead, coupled with a faint tinkling sound.*
*The air around you becomes moist and heavy. Overgrown liches and briars seem to suffocate the very walls.*
*A sudden cascade of rocks and dust blasts through the silence of the gullies, followed by heavy footsteps.*
*The poisonous stench of brimstone invades your nostrils, a hellish glow growing around you by each passing second as the air warps and howls. Truly, something unnatural is afoot!*
*The lake's murky waters ripple and froth angrily, the surface becoming an angry gurgle of mud and water.*
*Perched impossibly on the mountain's edge, a rapidly growing black blotch grows rapidly within your line of sight. A feathered creature approaches swiftly!*
Do these work perhaps?