You must not drink the liquid of the reservoir this month: it will bring into your corpus an obscure parasite with the ability to transform the voice into a forgotten music.
Your cries for help as you vainly try to tread water will sound to the birds like mating calls. One will strike you in the head. The sucking hole left behind will let out the memory smoke, instant death for any insect passing through.
When they fall to the water, the surface ripples and shatters the star light, the last thing you see as you sink to the submerged village below. The fish, taking their unexpected feast, will find their minds filled with terrifying new colors and sounds.