What happened to the dragons?

You need to check not only the mods (usermods) folder, but also the maps folder. There might be mods there as well. I noticed that the twilight dragons now have magic immunity.

I'm currently playing through the second mission for the Warlocks in version 3.0. Once I build a dragon lair or capture a castle (which will probably be faster), I'll definitely check the dragons' stats.

When asking questions, it's best to specify the game version.