Ice Ice Baby
EXP: 22,697, Level: 6
Level completed: 39%,
EXP required for next Level: 4,303
I'm going to go ahead and assume that what you want is the combination of Adam's sword and semblance from RWBY, the ability to absorb, store, and release pent up energy with a single slash that produces a powerful shockwave.
There are two things I need to outline. The weapon has to have an upper limit on the amount of energy it can contain before it either simply stops absorbing or breaks from the pressure of the energies inside of it. Another thing, the weapon will have to be made of a high grade material capable of holding sufficient amounts of magical energy to release that shockwave, something in the realm of mythril, which would be weaker, or prevalida, which would be the stronger option.
So here's what I'm going to quote you on.
It will be a prevalida medium blade, Masterwork quality, with the most powerful available enchantment tier. The limitations will have to be outlined as follows:
- Past a certain threshold the weapon will be unable to absorb further energy, and may break under the strain of sustained contact with the magic
- The weapon may not absorb magic that manifests physically, like ice or earth magic, with the exception of the energy being directed at the blade, say if someone was trying to freeze the blade instead of hitting it with a warhammer made of stone
- The more powerful the magic being held by the blade, the more quickly it must be used before the weapon expels all energy. At its absolute limit, the weapon would release the full amount in a matter of less than a minute in all directions, potentially harming the wielder.
If you agree to these limitations, I can safely say that the weapon would come to 2,250 GP in total.