In the "Core Beliefs" section on Vecna, in Dragon Magazine 348, a holiday of the Clerics of Vecna is described. During this holiday, cultists try to create two powerful constructs. One of these is made of hands, and the other made of eyes. This ritual can only be performed with the right materials, on the correct date, and with the direct interference of Vecna himself. As such, succesful completion of the ritual is seen as a sign of great success and the favour of Vecna. Both constructs are Large, and have an ability to drain the life of their opponents, by grappling or looking at them respectively.
Though the article was very detailed in describing how the constructs look and generally what they are capable of, I could not find an official statblock. Do these creatures have official stats anywhere?