Do we know anything about him (or her? Googling seems to support the "him" part... so let's assume "he") at all? He doesn't have anything on him on either UESPWiki or Imperial Library even. I know nothing of him other than he turned Ulfgar the Unending's friends to stone. I'm currently even unable to access to Ulfgar's dialogue that could enlighten me about the timescale when it actually happened, and possibly other things as well.

That is, I'd want to roleplay him. I'd figure that a (I think we can assume) Nord mage so strong could keep himself alive for a very long time, seeing as he must at least be unbelievably strong in Alteration, possessing a (now already forgotten?) skill of turning unwanted people into stone. There are Burden and Drain Speed spells, among others, for this I thought of using. I'd also gather that he is either very cunning and tricky, a pain for certain people just for the fun of it, or outright impulsively evil in his actions, crushing everyone who opposes him. Maybe shifting between those depending on his mood (and how I choose to play at any time). There might be more into his persona, but I don't have a chance to speak to Ulfgar, nor can I find all his dialogue. Could someone post everything he says considering Grimkell, please?

Also, if you can come up with other mysterious sorcerer stories from around the time (and for timescale I'd need Ulfgar's dialogue!) he was a menace to Ulfgar & his friends that could link to Grimkell, please post them so that I can get more content around my next character. No matter if they're actually Grimkell's doings or not. Just so that they fairly credibly could be. I'd be willing to (re)construct as many things as possible around this character of mine. Or, if you feel like inventing some approppriate stuff to his character, you're welcome to write it down as well!

And, of course, if there's other real info about him available, all the better!

So, let's build ourselves an uncanonized Grimkell that I could play, based on as many facts and good assumptions as possible! Posts away! Thanks in advance to everyone!

(One thing: I don't know why but I feel like playing him as a female Nord after all. The name "Grimkell" first brought your clichéd mysterious, bitter age-old witch to my mind. Even if Grimkell really is a male name, she could still use it as an alter-ego / "stage name" to add to her mysteriousness. Or maybe no-one even knows if he's a male or a female! Nor should it necessarily be a male name in TES world even if it is in ours.)

D'oh, so according to UESPWiki Ulfgar "is over five hundred years old", meaning this encounter with Grimkell could've happened somewhere around 450 years back. So it dates somewhere to the end of the 2nd era if I'm correct. Phew, it was far longer than I remembered. I guess one more showing of Grimkell's huge magic powers is the fact that Ulfgar's lived for so long. He's a warrior himself; I don't think he has lived so long by himself, but been cursed to live (by Grimkell, not much doubt).

I could also flash a theory I mentioned elsewhere here a few days ago. I think that the story of the Nerevarine visiting Ulfgar & friends actually resurfaced (or even invented) the knowledge about "Sovngarde" to the Nordic culture! (At least in Solstheim, a separated island where some beliefs could be forgotten, even if not in the main land Skyrim.) In real life it must've been just a part of a random quest in Bloodmoon that then got greatly expanded in Skyrim, but I could easily see it as a resurfaced or brand new religious piece of information in-game level. The only mention of Sovngarde left in Solstheim seems to have been in the book "Sovngarde, a Reexamination". Then, as time went by, the story of Nerevarine visiting Ulfgar etc. must've gotten famous and spread -- and so the concept of Sovngarde as well.

You won't find any enlightenment there unfortunately, only more confusion. Ulfgar says it happened "500 years ago" about when he was "one of Ysgramor's 500 Companions". The date given is off by about 4000 years for Ysgramor.

Hmph! But it's okay to build scenarios from that one as well. Maybe Ulfgar was a bit nutty all along, just thinking that he was serving Ysgramor? Or maybe they had a cult around an actual (fake/reincarnated) Ysgramor? Maybe Ulfgar's nuttiness was the main reason why Grimkell ever did horrible things to these guys: like a school bully to those theye bully because they're "different". Heck, maybe Grimkell's sorcery even made Ulfgar & co. loonies in the first place! I'm adding Illusion to his/her repertoire! A mage just trolling random people with superior force, but not killing them, sounds like a fun character to play!

Or maybe it really happened 4000 years ago, but Ulfgar just lost the track of time somewhere. "500 years... or was it 4000? Who cares? I've been here for too long anyway."