First things first, not sure if custom crests count as eMod or another tag so I'll wait for Heavenfall to enligthen me. 
Now, business.
For those who don't know, I'm making a mod and one of the ideas is that any content in it (resource-wise), should be usable by anyone. So why wait in the custom crests department? This mini mod gives you custom crests to use with your custom factions.
I know that only a few are actually "cool" but they didn't cost you any effort so keep that in mind, huh? And as I'm going to keep doing some more, I hope to actually make some more "cool" ones. One can dream, right?
Or get lucky. 
Wintersong's Faction Crests
v 1.0 (I suppose)
Download link: https://www.wincustomize.com/explore/elemental_war_of_magic/19/download
- The files in the .Zip file should be placed in the following place: documents\my games\elemental\mods\
- You will need to mark the check "Use Mods" in the Options menu in order for it to work (d'oh!).
- To allow one of the factions created with the Faction Creator to use one of the Crests added by the mini mod, you must locate its file in the documents\my games\elemental\Race folder and open it with a text editor. Look for a line that contains: <PreferredLogoType>CrestName</PreferredLogoType> and then change the CrestName for the InternalName found in WS_CoreLogos.xml associated to the logo that you want the faction to use. For example, I could change CrestName for WS_Crest_013: <PreferredLogoType>WS_Crest_013</PreferredLogoType> and save the file. Once you start the game again, the faction should be using the custom faction crest (in that case, the one with a rose and a wolf).

Wintersong's Faction Crests II
v 1.0 (I suppose)
Download link: https://www.wincustomize.com/explore/elemental_war_of_magic/26/download
- The files in the .Zip file should be placed in the following place: documents\my games\elemental\mods\
- You will need to mark the check "Use Mods" in the Options menu in order for it to work (d'oh!).
- To allow one of the factions created with the Faction Creator to use one of the Crests added by the mini mod, you must locate its file in the documents\my games\elemental\Race folder and open it with a text editor. Look for a line that contains: <PreferredLogoType>CrestName</PreferredLogoType> and then change the CrestName for the InternalName found in WS_CoreLogos_II.xml associated to the logo that you want the faction to use. For example, I could change CrestName for WS_Crest_103: <PreferredLogoType>WS_Crest_103</PreferredLogoType> and save the file. Once you start the game again, the faction should be using the custom faction crest (in that case, the one with the gold coins).

If you happen to find any error, let me know.
I originally planned to just post the crests for people to grab and use as they wanted but considering how it actually works (Stardock? Fix please?), I thought that maybe it was better do it as (mini) mod, which should reduce some steps for people.
For those who would prefer to know what the crest is included (because most probably will be interested in one or two of the 120 crests at best), I include all the crests here. If you only like one, right click on it, "Save as" and... well, do the needed things to make it useable for your faction. 
Some crests are random, others are to be used by some of the factions of my mod, and others are just eye candy. If you happen to like any, cool. If you happen to not like any, cool too because I make them for myself and sharing them is a collateral effect.
For the future, I need to try to make them more simple in backgrounds (except the most special ones) to reduce file size.