Burning Snakes are a type of Ninjago Wildlife native to the Caves of Despair. Although they appear to have some form of fire breath, their main attributes are their enormous size and dangerously toxic venom—the largest known specimen was 74 feet long and capable of paralyzing an elephant in just under three seconds with its venom.
LEGO.com Description
More than poisonous, Burning Snakes are super-toxic and super-sized. The largest one found was 74 feet long, as thick as a cow, and packed with enough venom to paralyze an elephant in 2.9 seconds.