When you poured her a glass of slow-acting poison?

They gave them a drink laced with a very slow-acting mercury-based poison.

Only high prices limited the intake of these slow-acting poisons.

It was a slow-acting poison, which is why it took so many months to kill my Ru.

Laced in with the sedative was a slow-acting poison.

Their bites had a slow-acting poison that they used to kill crippled animals.

Then he must prepare the slow-acting poison that so closely mimicked consumption and form it into a thorn.

He could never be sure that one of the food ingredients was not a slow-acting poison.

"Here, drink this, just in case my sister gave you some slow-acting poison."