I don't know but I didn't find it very convincing, the enchantments seem pretty weak compared to some of the other new gear. I'll let you judge for yourself:

Mask
http://img502.imageshack.us/img502/5217/capture2nqi.jpg
Boots
http://img641.imageshack.us/img641/7483/capture3tk.jpg
Gloves
http://img10.imageshack.us/img10/2791/capture4pg.jpg
Robes
http://img28.imageshack.us/img28/5963/capture5xy.jpg
Sword
http://img217.imageshack.us/img217/7131/capture6fu.jpg
Staff
http://img231.imageshack.us/img231/7748/capture7tu.jpg


Then there is this beauty, not related to Miraak but the enchantment is awesome for a Mage character.
http://img823.imageshack.us/img823/3017/capturenua.jpg

Out of Miraak's gear his staff is probably the best item imo, just wish the enchantments were a little better for such a high profile character. I guess the main reason anybody would wear his stuff is mainly for aesthetics.

There are two more masks that do the same for fire and frost magic. Any who like all cool-looking/unique gear, they often have a crappy enchantment. Maybe if the robes had more buffs to shouts and cooldown effects it would be more worth while.

His sword looks like Soul Caliber.

Too bad the boots and gloves are worthless if you are not using the robes. They would be better if the enchantment didn't rely on the robes.

The tentacles on the sword move which is cool but come on absorb 15 stamina that's weak.

Meh.. strength and value kind of svck. Aesthetically they are quite nice.. the type of enchantments are fun too.

tentacle explosion?
...
umm... No thanks

I've seen enough hentai to know where this is going.

I wonder how many times this has been said since the DB trailer has revealed...

I may or may not have uttered "So this is what being a Japanese Schoolgirl feels like..." When I got to Apocrypha.

That reminds me, are the dragon priest masks disenchant-able? I doubt it, but it would help out mages quite a bit if they were.

From the video of people fighting him (yes I'm a PC player and I nonetheless spoiled it for myself out of curiosity and it looks AWESOME), it appears that he spends most of his time using his staff and spells and the sword is more of a backup weapon. Maybe that's why it's much weaker?

Also could have some scripted power that's just lacking a description....I know in vanilla Skyrim the Morokei mask was supposed to decrease the time between shouts or something 20% and it didn't get fixed until much later.

They are definitly not, those enchantments are unique to those items.

So much for that then. Oh well, if you like masks, then these are good to wear. Not my style though.

The sword is bad ass!

Yeah looks cool but the enchantment blows.

They need a perk that lets you remove enchantments from gear or something. Unique gear often has enchantments that are bad.

It's tentacular.

I treat it as the arms and armor of a worthy foe, and refuse to wear or equip any of it.

Agreed. I wish I could take that miraak enchantment and make my own. Same for the talos amulet, so I can REALLY augment my shouting capability. Or at the very least disenchant the robes without destroying them like you suggested. I want the ebony mail to be wiped clean soooo bad. Its one of the best looking armors in the game, but has the lamest enchantments.

I have it on display at my house, lol.

I am going to wear it as I travel to see "what happens"

Disapointed.

Well, due to the effect the robes have, I think (wait for overused cliche statement) we've seen enough hentai to know where that is going! Badum bum!

Hear you there. I am a sorceress, so it should be a lot of fun. lol

lol, just kidding.