The Killer Caimans are the product of selective breeding by the lizard people over several centuries. Once rather harmless caimans, today resilient beasts - the selection changed them according to the whims of their lizard masters. In ancient times, the caiman breeding was a pastime of the royalty and a strong caiman was a vital prestige object. Caiman battles were arranged to show off and to settle conflicts. Over the years, caimans escaped or were given as present to loyal subjects who set them free or interbred them with escaped beasts. This way, they slowly found their way back into the wilds. Later lower caste lizards captured them and they became widespread pets.
The Killer Caiman that is found nowadays in Zao has surpassed its ancestors in all ways. As if they weren't already dangerous enough, the royalty of the lizard people still possesses caiman hatcheries where they breed even stronger and more resilient versions of the Killer Caiman.
Damage Taken From Elements
Killer Caimans are very fast when they use Haste, so they can catch up quickly even if they just appeared on the screen. They are very easy to be overlooked due to camouflage and lizards that they are close to. They can drop a lot of money in Gems and Obsidian Lances. You can easily make a fast profit here.
Knights: At about level 80, you can hunt these easily with just Mana Potions and Recovery and Wound Cleansing with very little cost. Just attack them, and keep mana for Berserk if there are three or more.
Paladins: Keep distance at all cost but also be careful not to let yourself get swarmed by other creatures. A good idea is to find a large area of grass/stones and run around it while shooting.
Mages: Use Wand of Starstorm/Underworld Rod along with Flame Strike and/or Energy Wave/Great Energy Beam if you are a sorcerer or Strong Ice Wave if you are a druid. They are only 5% weak for energy, so it's still better to use Great Fireball instead of Thunderstorm (Thunderstorm does 10% less average damage).