Question

Guess me : On six feet, I am a noxious drink, Of whose effects you shudder to think. Change only my second.............. On six feet, I am a noxious drink, Of whose effects you shudder to think. Change only my second foot, and then You convert me into a horrible den Where the culprit, who gave the noxious drink, Awaits the fate of which you shudder to think.

Answer 1

HINT: Try reading it with "letters" instead of "feet".

poison/prison

"On six feet" means a six letter word. The first two lines refer to poison. The next two lines refer to prison. The last two refers to where "the culprit" who gave you the poison would go -- prison. He would go to prison for poisoning you.

Hope I helped you! :)