Your favorite and least favorite monsters in Heroes.

Oh!!! I found it!!!
Basically, the Hive can only shift units in the initiative order if the Summoning magic is developed! That's it! So, the Hive of the Sylvan faction doesn't have this effect... 100%

(based on materials from the magazine "Best Computer Games")

Does the Hive generally have this ability, or is it specific to the Sylvan faction (and therefore unable to move units)? If it's specific to the Sylvan faction, aren't elves usually given Summoning magic? Or not?
I also searched here... basically, in the same thread, on page 6, posts 178-181.