The Mechannids are powerful diggers, swimmers, and can wiggle their longer forms through the aether and the void of space. They vary from 2 or 3 cubits up to twice the height of a man.
Some have venom injectors in their maws, and some have ferrules in their tail-ends that cause non-healing wounds. They retain expressionless faces on one end, although they do not feed in the usual sense. They may convert radiation or psykick energies for sustenance - proof of this is that they are known to skulk amongst civilized sentient peoples causing distress and alarm. They also bask in and around ley lines and highly charged areas.
Lastly, at least one in every group encountered is a sigil-annelid master. It can cast one magical effect per day by contorting its form into physical shapes that release magical energies. They enjoy completing simple ones (the Voorish Sign-form, for example) and cantrips but enervating bolts and shrouds of forgetfulness are common dweomers. They enjoy summoning electric void-spiders as a matter of course and sometimes take up with more powerful wizards to siphon energy away parasitically.