Originally Posted by cherokeesam
Here's another thought about the Cube being the artifact that changes Algrim: maybe it's Algrim who changes *himself* with the Cube.
It's a fairly mundane solution, but one that's a lot cheaper for the studio bean-counters: instead of introducing (and casting) a whole 'nother character with godlike powers to create Kurse, and instead of letting the Cube fall into enemy hands yet again, why not just have Algrim try to take the Cube from Odin, and accidentally/intentionally wind up getting morphed into Super Darkelf?
There's that report of AAA having a scene with Odin and Frigga, and Frigga (allegedly) dying at some point; so maybe Algrim makes it to the Asgardian throne room, confronts Odin and kills Frigga and/or The Allfather, and takes the Cube (either for himself, or at the behest of Malekith, or even Thanos if he shows up after all). But the power is too great for him, and he winds up becoming a twisted Hulk-like monster.
*That* is a very creative idea! I really like it! You're right, it keeps things simpler by having an object, rather than a new character, handle the development.
With the caveat that I am relatively ignorant about Odin's powers, it seems to me that this idea helps address another logistical problem: how do you keep incredibly powerful Odin from solving all the problems in 5 minutes? Maybe there's blowback from the cube when Algrim tries to activate it, leading to Odin being incapacitated or seriously limited for some stretch of the film. If this doesn't make sense for Odin's abilities, then nevermind.
We'd need another McGuffin, though, because when the Red Skull actually touched the Tesseract, he went to another dimension. Here the plot needs Algrim to stay in this dimension and become Kurse. So maybe he doesn't touch it directly (maybe it's still in the holder from the end of The Avengers?), only tries to manipulate it.
Another wrinkle I thought of is why Odin would have the thing out of his vault. But it seems like he could have brought it out due to the attack, if that's what's happening.
The only other question is the sequence of events such that Algrim can successfully take the Tesseract out of Odin's hands. Don't have an immediate answer on that, but I suppose it's possible.
Thanks for sharing the idea!