system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] If we found the right thing to have the Blade of Godric Gryfindor absorb, could it become the ultimate weapon?

The blade does not dull or rust and only takes in that which makes it stronger.

So that could be very interesting indeed.

First what is defined as strengthening it?

We know it is now permanently impregnated with basilisk blood, so it can absorb and secrete poisons.

What is the best thing the blade could take in which fits the criteria of "Does not weaken blade" AND "Strengthens the blade" ?
gpt
It already is the ultimate weapon. It's unbreakable, and with basilisk venom infused it is 100% deadly. It's clearly stronger than a killing curse because killing curses don't affect horcruxes, and killing curses are already one of the strongest ones in existence.

I don't see how it could be any deadlier unless you wanted it to shoot out curses or something. Or if you're talking about making it more beneficial to the bearer you could talking about maybe adding some positive attributes to it.