Kuldra's generals were prone to a spot of gallows humour. In the evenings, over a drink or two, they would argue about Kuldra's heads and which of them they would prefer to be killed by. Their tone would only be half-joking. They had all been in the presence of Kuldra when she was displeased, and saw the looks of those who had displeased her. They knew (from the expressions of the damned) which head caused the slowest, most painful death.
The poison head was the one they wished to avoid. They carried a rune dagger in their boots, in the event that they fell foul of it. It was better to die by one's own hand than perish by Kuldra's poison.