It is a jeweled encrusted bug. Once activated a normal looking bug in all ways. The bug becomes what ever it appears to be, except for the psychic link.
The wrinkle is that you have to read the inscription that is on the bottom of the “Bug” to give it life and bond it to you. The “Bug” will change from a jeweled bug into a real bug (of what ever type it appears to be). It will live as a real bug for the standard life time as if it were that bug (i.e. one day for a house fly).
The cost is that the reader will give the bug its life from him/herself. A gift of life should cost the owner some small amount of hit points. Once the bug dies/is killed the hit points will return to the owner slowly over a five day period.