Attack----------7
Defense--------6
Damage-----------5-7
HP-------------22
Speed------5
Initiative----9
They disintegrate (which is understandable) and immediately teleport their remains to any point on the map (I still don't understand the reason (it's a friend's idea), but it's original, because we haven't encountered anything like it in Heroes yet).
Added 2 minutes later
And since when are undead aesthetically pleasing? Oh, yes, the growth rate is 8.