Based on the concept artist done by this user on Reddit: https://www.reddit.com/r/DotA2/comments/21ja3k/twisted_blade_of_avernus_concept_art/

I've been really into this design! I got inspired as one of my past campaigns involved one of our characters gaining the Blade of Avernus in the quest, so I thought it would be fun to one day 3D print a replica and present it to him on his birthday.

But in the meantime, I thought this might generate more inspiration for you many creators out there too!