Weapons & Equip True Night's Edge and True Excaliber require having their true potential "unlocked" via soul keys

[AidanMariocraze]

True Night's Edge requiring Key of Night and True Excalibur requiring Key of Light makes sense to me

The soul keys (currently used for summoning infection biome mimics) being used to craft the blades makes it seem your "unlocking" their True potential

Acting as pre-Plantera version of Terra Blade's Broken Hero Sword

Recipes
True Night's Edge: Night's Edge + 20 Souls of Might + 20 Souls of Sight + 20 Souls of Fright + 1 Key of Night
True Excalibur: Excalibur + 24 Chlorophyte Bars + 1 Key of Light

 

[firecat666]

Can't say I really want this but it would tie in nicely with this thing I suggested.

 

[Heliodoros]

How about decreasing the cost?

True Night's Edge: Night's Edge + 15 Souls of Might + 15 Souls of Sight + 15 Souls of Fright + 1 Key of Night
True Excalibur: Excalibur + 20 Chlorophyte Bars + 1 Key of Light

But I Do like your idea. It totally makes sense.

 

[Stellar Mastodon 267]

It does make sense. I agree some decrease to other cost is warranted.

 

[Big Sammich]

This seems like a pretty pointless change to me. It's very easy to get a Key of Night/Light. Just spend a few minutes in the Underground Corruption/Crimson/Hallow and you'll have one. I don't support it, because I don't think this adds anything meaningful to the game.