Contents:
0) V2 Changes
1) Mod description and requirements
2) What makes this mod different from other summon horse mods?
3) How to summon Aeonbarr
4) An important note for those using Convenient Horses
5) Bugs
6) Q&A
7) Special thanks
8) Change log

0) V2 Update

V2: updated features
- More customization options: new manes, skins, eyes, eye glow colous and ethereal colors
- Manes and skin can be customized independently
- Quicker summoning (on slower machines, V1 had a 2-second delay between summoning Aeonbarr and him arriving. This delay has been removed)

V2: new features
- Custom armor option, allowing you equip Aonbarr with any armor from any mod (see details below)*
- Over 70 new nicknames for Aeonbarr
- A new mark and return feature that lets you use Aeonbarr to instantly teleport between three locations
- Waterwalking and heal spells for Aeonbarr
- Customize summon rotation
- No more need to carry the Token to summon Aeonbarr

*Here are the steps to equipping Aeonbarr with an armor from another mod (Convenient Horses armors can still be equipped as in previous version):
1) Go to your Skyrim data folder and locate the .nif file for the armor you want Aeonbarr to equip.
2) Copy the .nif file into your Skyrim>Data>meshes folder (do not place it in a sub-folder within the meshes folder)
3) Rename the .nif file: AeonbarrSaddle.nif
4) Run Skyrim, open the Aeonbarr MCM and set the armor type to Custom Saddle
5) If there are clipping issues with Aeonbarr's mane and the new armor, enable the Hide Mane option

V2: quest remake
- A brand new quest to obtain Aeonbarr
- Quest can be skipped
- New dungeon, new enemies, unique story
- Head to Blacksted Barrow (see the images above) to begin the quest

V2: dropped features
- Autosummoning (never really save time and was a bit buggy; in the end, I decided the mod was better without it cluttering up the MCM)
- The fear spell (cause it wasn't all that great anyway, and the MCM is clearer without it)

V2.1: update
- This small update is a bug fix which stops the Blacksted Legacy quest being auto-completed whenever you edit something in the MCM. It also has tighter scripting around the quest to prevent some bugs that could occur there.
- Files no longer in a bsa (the bsa seemed to be causing issues, so the files are now loose; I recommend, therefore, installing with a Mod Manager)
- One or two other small fixes


 

1) Mod description and requirements

Review by Brodual

Review by Nozi87 (skip to 03:32)

Review by MMOxReview (skip to 00:49)

2) What makes this mod different from other summon horse mods?

Reason 1: Full Convenient Horses Compatibility
Most summoned horses are not compatible with a lot of the features of Convenient Horses. Aeonbarr is. This is because riding summoned horses doesn’t usually make the game register the summoned horse as “your horse”. This mod does (for more information on how this is implemented, see the Q&A section below). This means you can make use of all the features in Convenient Horses, allowing you to (amongst other things):

-         Customize Aeonbarr’s follower behaviour.
-         Customize Aeonbarr’s armor using the armors provided in Convenient Horses.
-         Customize Aeonbarr’s speed, health and stamina.
-         Access Aeonbarr’s inventory.
-         Make full use of auto-looting.
-         Use mounted actions, like talking to NPCs, harvesting ingredients and rapidly dismounting.
 
 
Reason 2: Aeonbarr’s Customization Options (with MCM)
Convenient Horses adds a lot of great customization option for horses. This mod adds several more options that are unique to Aeonbarr. Here’s a list of some of Aeonbarr’s features you can customize:

-         Skin color
-         Eye color
-         Eye glow color
-         Equipment (i.e. armor, armor color, armor material, e.t.c.)*
-         Whether or not to make Aeonbarr ethereal
-         Ethereal color
-         Speed**
-         Size
-         Damage resistance
-         Magic resistance
-         Falling damage resistance
-         Attack damage
 
* This mod adds several new armors. You can use armor permutations included in this mod, and you can also use armors provided in the Convenient Horses mod (provided you have Convenient Horses, of course).
** If you have Convenient Horses, it’s best to edit Aeonbarr’s speed using the settings provided in the Convenient Horses MCM, not those provided in the
Aeonbarr MCM.
 
 
Reason 3: Simplicity
Many summoned horse mods require multiple spells to summon multiple horses and banish them. This mod includes just one spell, which you can use to both summon and banish Aeonbarr. Furthermore, you can receive this as either a conjuration spell with a magicka cost (good for mages), or a lesser power with no magicka cost (good for warriors).
 
 
Reason 4: Immersion
This won’t be a big problem for some people, but for me, I find that summoning unique named horses deserves a more unique process than buying a tome from a vendor (Summoning Arvak, for example, requires a special quest in the Soul Cairn). This mod fixes this problem. 

The ability to summon Aeonbarr is now a reward for a small quest called "The Blacksted Legacy", which is included in this mod. During the quest, you can also discover some of Aeonbarr’s backstory.
 
Another problem with immersion involves the spell casting process. If you’re playing an immersive role as a warrior, for example, you might want to avoid spell casting. This mod avoids this problem by allowing the player to summon Aeonbarr with a lesser power with no magicka cost instead
of a conjuration spell. How you summon Aeonbarr (either a spell or a power) can be customized in the mod's MCM.
 
 
Reason 5: Backstory and personality
Being an individual horse with a small backstory, Aeonbarr has a bit more of a personality to him than a generic summon in much the same way that followers like Lydia and Serana have more personality than a summoned dremora.
 
I have made sure that Aeonbarr’s origins are mysterious so that individual players can form their own ideas of what Aeonbarr is and where he comes from (I have hinted, however, that Aeonbarr is more than just a normal horse). There are three books included in this mod, all of which add some degree of backstory to Aeonbarr:

- “Alfred and the Unknown Huntsman”, a children’s story featuring Aeonbarr. This is also a skill book that will improve your block skill. This book can be found in Blacksted Barrow. It has also been added to the list of randomly generated books, so you may encounter it elsewhere.

- “The Blacksted Legacy”, a scholarly book that speculates on the origins of Aeonbarr. Reading this book will initiate the quest, "The Blacksted Legacy", the reward for which is the ability to summon Aeonbarr. Two versions of this book exist: one in Blacksted Barrow, and one in Dead Man's drink.

- “Alben’s Notes”, a four-part account of the events surrounding the new quest, the Blacksted Legacy. Part 4 is found on Alben's corpse outside Blacksted Barrow; Parts 1-3 are in the Barrow itself.
 
 
Reason 6: Hotkeys
The following features can be assigned as hotkeys:

-         Summon/banish Aeonbarr. This can only be used when you are using Summon Aeonbarr as a Lesser Power
-         Mounted Banish – when used while riding Aeonbarr, Aeonbarr will be immediately banished, allowing for a rapid dismount
-         Mark and Return - use to travel around Skyrim instantly while mounted on Aeonbarr


Reason 7: No effect on summon count
Another problem with summoning horses in most mods is that it counts towards your summon count. In other words, you have to choose between summoning a fire atronach (for example) and a horse. This isn’t always a problem, but for some it could be irritating. This is not the case in this mod. Aeonbarr does not count towards your summon count.
 
Furthermore, you won’t have to worry about breaking immersion by summoning two Aeonbarr’s if you have the Twin Souls perk. Aeonbarr is an individual, and you can only summon one of him at a time.
 
 

3) How to summon Aeonbarr

 
 

4) Important notes for those using Convenient Horses

If you are using the Convenient Horses (CH) mod, you should be aware of the following:

-It is highly recommended that you make Aeonbarr an essential character. If you don’t, CH will remove Aeonbarr’s essential status, which could cause problems if he dies. I’ve added some fail safe scripts to prevent any problems from arising, but it’s better to be on the safe side.

-To register Aeonbarr as “your horse”, thus allowing you to take full advantage of all the features in CH, you will need to sit on him.

-There are two ways to customize Aeonbarr’s speed: with the Aeonbarr MCM (A MCM) and with the Convenient Horses MCM (CH MCM). You should use the CH MCM and set the A MCM speed value to 0.

-If you want to use the armors provided in the CH mod on Aeonbarr, you must open up the A MCM and set Aeonbarr’s Equipment Type to Convenient Armor.
 
 

6) Q&A

How do I solve the puzzle in Blacksted Barrow?
There is a puzzle in Blacksted Barrow. For those who can't solve it or just don't want to, here's the solution:

How do I get Aeonbarr?
The ability to summon Aeonbarr is the reward for a new quest called “The Blacksted Legacy”. To begin this quest, head to Blacksted Barrow (see the images above). Alternatively, choose the Complete Quest option in the MCM.

Where is Blacksted Barrow?
It's in western Falkreath. Reading the book, "the Blacksted Legacy" will mark it on your map.

Where can I find the “Blacksted Legacy” book?
Two copies exist. One is in Blacksted Barrow. The other can be found sitting on a table in Dead Man’s Drink, i.e. the Falkreath inn.

What existing files does this mod edit?
The cell, FalkreathDeadMansDrink, is edited by this mod, but this is not a vital edit. This means the edit can be removed using TES5Edit without breaking the mod if it’s causing a mod incompatibility issue in your system

So, how is the mod implemented?
Put simply, most summon spells work by creating a new creature every time you cast the spell. This doesn’t work alongside CH, hence why so many of the features don’t work on summoned horses. This mod works differently. Aeonbarr is not a generic creature that is spawned anew with every summon; Aeonbarr is a unique NPC.
 
The spell that summons Aeonbarr essentially moves Aeonbarr around between Skyrim and a second, inaccessible cell. This process has quite a bit of scripting to make the effects seem natural, fluid, and as indistinguishable from a normal summoning spell as possible.
 
The Convenient Horses features don’t seem to be working on Aeonbarr…why not?
For any features to work on Aeonbarr, he must be registered as “your horse”. This isn’t done automatically when he is summoned; you must sit on him first to make him “your horse”. Once this is done, most features should be compatible.
 
Still not working…
For some features (like speed), the effects can only be applied when Aeonbarr is not mounted. If changing a feature like speed, you’ll have to un-mount and then re-mount Aeonbarr.
 
OK, but…still not working…
Is it an armor problem? If you’re having trouble equipping the armor provided in Convenient Horses on Aeonbarr, remember: you have to set Aeonbarr’s Equipment Type to No Saddle in the MCM first.
 
Nope, not an armor problem…
Post your problem in the Posts section. I try to check the Nexus every day to answer questions, and if you have a problem I or someone else might be able to help.
 
So, Aeonbarr…where’d that name come from?
Aeonbarr is an alternate spelling of Enbarr, the horse of the god, Lugh, who features in Irish mythology as a hero and High King.
 
Is Aeonbarr a daedra?
Whilst I’ve written quite a lot of material to create a small backstory for Aeonbarr, I’ve deliberately left his origins a mystery. Whether or not he is a daedra, I cannot say…I leave that to your personal interpretation.
 
What happens if Aeonbarr dies?
Aeonbarr is essential and so won’t usually die, but if his health drops too low in battle, he will be un-summoned immediately. He can be re-summoned at any time with full health. For those using CH, it is recommended that you make Aeonbarr essential, otherwise he could be killed and this might cause all kinds of problems. I’ve implemented systems that should prevent Aeonbarr’s death even when he isn’t essential, but it’s better to be safe.