The official GemStone IV encyclopedia.
The siren lizard has multicolored pastel skin which appears to be rather scaly, a long, blunt snout, sharp teeth, and a swiftly moving tail.
It is wise to prepare one's self by casting Poison Resist (105) before hunting these creatures, so as to benefit from an additional warding check. Siren lizards have a chance to inflict a poisoned state upon almost every melee attack made against it, as a sort of defense mechanism. The poison is based on the warding failure (e.g. +110 will yield 10 damage over time) and dissipates 1 per round. Additional attacks upon a siren lizard while poisoned will not incur another poison warding attack. Remaining poisoned at a low rate (such as 10 per) with acantha leaf or Bloody Krolvin ale will allow you to continue to hunt siren lizards with no poison attacks until it is fully dissipated.
Killing the siren lizard in as few hits as possible is essential. Ambushing is useful in killing them quickly.
A similar poison effect occurs when attempting to skin a siren lizard.
Siren Lizards have both a tail sweep maneuver and a tail natural weapon attack.
>A siren lizard lashes its tail with lightning speed at your legs!
You lose your footing and fall to the ground!
A siren lizard swings its swift tail at you!
AS: +255 vs DS: +205 with AvD: +31 + d100 roll: +42 = +123
... and hits for 12 points of damage!
Jarring blow to your back.