[words]
So yeah, that's my idea...
Mine is a little more "Bring me ten bear asses" in that the PC must acquire certain key components and knowledge in order to craft the weapon. Marae's fate determines the outcome, a rescued Marae allowing you to make the holy version, and likewise with the corrupt variant.
Both versions require the same physical components:
Handle - Piece of Marae's tree bark
Blade - Hardened mineral ore(Volcanic crag random loot I'm working on, could be used to upgrade weapons if I get around to messing with that.) x 5
Crossguard - Gold Ring(from the jewelry in Tel'Adre) x 3
Handle wraps - Torn between a set of leather armor(which will be scrapped for the pieces) or tough spider silk x2
Lethicite shard - Can be either from Marae's own, the statue up in Lethice's fortress, Sheila's or a demon NPC if people don't mind killing off either Ceraph or Vapula.
Pure version requires:
Gargoyle in the cathedral being able to perform her rituals.
Having entered the Inquisitor's Chamber.
Marae mustn't be corrupted.
Corr version requires:
Having entered the Inquisitor's Chamber.
Have 80+ corr.
Marae being corrupted, having both her perks and not having beaten her.
First the PC would contemplate on their weapon while looking at the sunset, figuring that if they wish to bring down/replace Lethice, they need to get better gear. Then after some thought if their Str is over 60, they'd settle for a greatsword. After a visit to Marae's island to present the idea/take the bark by force, you'd make a list of the required components.
After gathering them you take the pieces to the smith in Tel'Adre to forge the physical body of the sword, which gets you the key item "unfinished sword" until you take it to the Gargoyle to perform a blessing upon the blade with your blood/perform a ritual similar to how you corr both Jojo and Amily with your blood to give you the finished product.
Why blood? Because blood is the essence of life in all sentient beings, wether it's man or morph. Also because it makes the blade soulbound to the champion, and the lethicite shard would allow it to be used as a catalyst for spells, similar to Dominika's spellblade, only a large variant.
Holy version does 35% more damage to creatures with corr over 35, and goes up to 60% extra damage if the target has 100 corr. It applies a status effect that prevents them from healing(like Akbal's saliva, Minotaur King, etc) and gives a small defensive buff when equipped.
Corr version is parasitic and feeds off the target's vitality to it's wielder(a la Ebony Blade in Skyrim), the sapped percentage growing to a 30% of the damage inflicted at full corr. It also buffs black magic spells by 50%. Overusage leads to a bad end with the champ becoming addicted to the life stealing properties of the sword and becomes a monster knight. Perks like Sadist and Masochist make the addiction develop faster.
Edit: This forum doesn't support spoiler tags, apparently.