NHF – new heroes for Heroes V 3.1.

A special ability for the Demon could be related to demonic spells:
1. Hell Wave - hits all creatures that are not from Inferno (a Lord spell from the final mission of the campaign for mages).
2. Devil's Chain - hits like a chain lightning, but with a red beam, affecting a group of creatures standing nearby (a spell of Biaara from the same mission).

One spell from the spellbook is already used by the Elf.
1) There is an issue with the mana cost of Hell Wave, and it is too powerful.
2) We have already considered Devil's Chain. We wanted to give it to Biaara instead of a repeating ability, but there was some kind of problem.
I remember using both of these spells for new heroes on the "Journey" map. You can try playing with these heroes.

Added 1 minute ago

I would suggest using the description of Bone Dragons as a basis. These creatures are created from the bones of several dragons, so you can implement Linda's specialization in the same way as Drago's. Only instead of an artifact from the dragon collection for killing several living dragons, the heroine will receive one Bone Dragon in her army.

The Necromancer hero will already collect them from Necromancy when enemy dragons are killed. This turns out to be the same idea again....

Added 7 minutes ago
Here is another option:
- For the duration of the battle, the hero receives Bone Dragons (or improved ones, depending on availability). The number depends on the week.
Well, it still seems a bit too strong...