Corrosion, an irreversible action, is a concept everyone understands very well.
As for metal weapons, they are hard and incredibly sharp, capable of injuring or killing any creature.
This is particularly effective when used against humans.
But these powerful and terrifying weapons have a fatal flaw - the constant threat of corrosion.
Every wielder must consider whether their steel weapon would be corroded.
After all, these items aren't cheap.
Damage a sword carelessly, and you would have to pay a hefty price for its repair.
It's a significant sum, as violence often equates to wealth, and vice versa.
Weapons that effectively enhance knights' fighting capacity are naturally not cheap.
The effects of blood corrosion will inevitably accumulate over time, and these precious items will become useless scrap metal.
And that is the worst and most undesirable scenario.