Mowgli investigates how the dragon killed his grandmother and Shere Khan. The villagers cannot show fire in the sticks due to the fact that the dragon contains electricity.
The dragon may well be the reincarnation of a prehistoric marine beast that inhabited the seas of Asian regions in the prehistoric times. He's so powerful but - he has no morality whatsoever - therefore the humans surrender him for their environmental catastrophes.
At last, the boy saw the dragon in plain sight.
The villagers still can't destroy the dragon with tiki torches, or if spoken colloquially in a rather misguided way, fire in their sticks. The dragon sees the humans and preys on some of them all in plain sight. The creature's relentless hunting instincts and dangerous gazes reveal something really lordly and tragic about him. The answer is, 'Do Not Slay the Electric Dragon, or his fellows would rip a human into bony drumsticks'.
As the dragon swims further from the village, the villagers sigh and leave.