questions about modding a spell

[Ragnarok-X]

so, lets reference Call of the Wild here. When cast, it spawns a werewolf leader and a bunch of wolfs in a foreign province, more wolfs if the province is a forest.
I would like to make something similar and/or alter the spell. What i really like would to see the actual spellentry, how would i go about seeing how this spell actually works inside a .dm file ?

Would it be possible to alter the spell to have spawn more than one werewolf leader ? Would it be possible to make it spawn normal werewolves among the stock wolves ?

Is there some kind of list where each spells actual .dm content is visible ?