You will receive two items. One is an ordinary, garden variety, harmless happy cobra that you can set anywhere purely for decorative purposes. The other is a cranky cobra that will explode on impact with a vehicle or a weapon, and sometimes even a person.
As it explodes and disappears the cobra will announce who has killed them in local chat. A short while after exploding the cobra will reappear.
You may drag and copy the happy cobra as you please, but you must rez each copy of the cranky cobra individually as they consider where they rez as their home spot and will return there no matter where you try to place them unless you reset their scripts. So, place the cranky cobra where you want it to be, reset the scripts, and then touch the cobra. This will enable you to set the roaming distance. For cobras on a track I tend to set it at which keeps them on the same spot. Once you have set their roaming distance touch them again to select 'start' and off you go!
Each happy cobra is one prim. Each cranky cobra is 2 prims.
Come see these critters inworld as part of my Sahara Sunset Rally Track display.
See item in Second Life
