Board Thread:Fun and Games/@comment-36708952-20180825123644/@comment-27971189-20180826060748

Status of 'prototype weapon' matters enough in Fate-verse. For example, Merodach to Gram, Excalibur, Caladbolg and Caliburn.

As Merodach, the prototype weapon, known to be A-rank weapon, all other swords that shared or recognized to stem from same histories also have their value on A-rank or below, hardly higher.

Caliburn is B as fellow 'sword of selection'. Gram and Caladbolg are A+, related to them there is Excalibur itself with A++.

Gram and Caladbolg are 'reforged' on its myths that they ended up carrying different myths, while Excalibur undergoes whole different history with fairies, etc. Still, not ignoring fact that all of them are A-rank weapons. So far only Ea the very prototype of weapon to be called "swords", a 'sword' that have EX-rank (aside of Santa Attila's candy bar).

Nasuverse already established that Durindana is prototype to Durandal. So Durandal value itself, if we following the lore, should be around A - B; Charlemagne and Astolfo in Extella already showing that paladins weapons are around B to A level; until further confirmation it won't be around B to possible EX like Knight of Rounds.