Are they mounted on several creatures at a time?

This is my soldier, which is mounted on a dune beetle, which in turn is mounted on a direspider, which in turn is mounted on a regular horse...
I know I am being terribly silly Can't help though, I do think its possible to create a new resource, but other modders have better experience with this.

~ K

Again, I am not the best modder, but take a look at the slaver trait, that gives you a certain resource if you defeat humans after a battle.

Although you CANT tie it to the class of the beast (as far as the rumours I read goes anyhoo), so you will have to be smart about it.

For the resource, try looking through old modding posts..
Edit: couldn't find anything on my own searches.

Sincerely
~ Kongdej

My best bet would be let defeated spiders drop this certain "spider" resource, and then you can use that resource to get new mounts, either via a spell or new unit training.
(The way you make them drop the resource would be similar to the "Slavelord" ability available to Magnar.)

Problem will probably be its a big work to get through to make only spiders drop "spider" resource, since as far as I remember you cannot run a check on the unit class (Unit type: Beast, Unit class: Spider), and would have to go in and give all spiders and similar creatures a custom unit stat, to tell them apart the other beasts.

Again, I am not modding daily, I just remember the tidbits from when I looked through all the modding stuff, and whenever I see HF help peeps

Sincerely
~ Kongdej

you could have them drop spider eggs the same way some golems drop iron, and other monsters drop crystal.   I don't know if it is possible to have items in the shop cost resources other than gold, but it should be.  One of the things I planned on modding was adding 1 horse resource to the cost of champion mounts (or warg respectively)

Thanks for your info isaac it worked.

I wanted to make the Umbrans available only to Toggs but i cant find a way to that. For now i tied the Umbran War Boar to the great axes ability, its good for some different look in the units i design

I'll add Skaths now to Quendars along with their racial ability for some more lore-friendly units.

About the dragons you mentioned i could suggest to make them available only for sovereigns from the shop after you research Dance with Dragons for an appropriate cost (i setted it to 5000 now i need to test it ) 

Cheers HF