Help with Animate Dead spell

[irook]

Hello there,
first, I would like to apologize, if this topic is already discussed somwhere, but unfortunately, I do not have a time for reading everything.

I have BG2 with ToB installed on my computer, and the game is also modded (Tactics, Ascension, Ease of Use, Items upgrade). The reason why I play this great game again is that I watched some movies of "Lets play BG2 (mods)".

And those videos are also the reason, why I posted my question here.
I this one
[url="http://www.youtube.com/watch?v=henR6m9xvas&feature=PlayList&p=23B11FECBA532D96&playnext_from=PL&index=22"]http://www.youtube.com/watch?v=henR6m9xvas&feature=PlayList&p=23B11FECBA532D96&playnext_from=PL&index=22[/url]
you can see the battle in Prebeks house Viconia cast Animate dead spell, from which the Ghast appeared.

I tried to find out, how is this possible, because my clerics can summon only skeletons whatever they do. And after 15th level Skeleton warrior, of course.

I know that this is minor problem, but I would really like to know, why "he" (Veriax in one of those videos) is able to summon ghasts, whereas I can not.

I think that the problem is not in the ToB installation and neither in mods installation. But maybe I am wrong.

If somebody knows the answer, please, let me know.

Thanks,
irook.

[Stworca]

It is a mod for sure. Normaly its not possible. I can't tell you which mod tho. Maybe SR.