The sword of the Lich King, Arthas, from Warcraft. Even for those who don't play (myself included, ironically), this is a testament to your 3D Printing skill and endurance.
https://www.myminifactory.com/object/frostmourne-from-warcraft-4156 is the original, but it needed some fixing up for printing. Details in the "How I Designed This" section.
I reccomend a high layer height because these peices are qite big. I pre-included supports, but I've included the original files for those who find them unsatisfactory. I don't reccomend changing the orientation of the files, especially the blade pieces for infill purposes.
Use a hammer to join the parts together, but have patience, lest you break the pieces. Make sure you have two of the "Handle x2" pieces. There is also a file in the original called "frostmourn-8" that takes the place of one of them, but it makes the handhold much smaller.
First, I scaled all parts down by 75% so they would all fit on my buildplate, and rotated to them to the optimal print position. Next came the supports, I auto generated most of them, but those often needed tailoring afterwards. I also cut the "Hilt" in half for a nice clean surface for the bottom.