photon blades used to be parriable before the addition of the greataxe but sometime slightly before or after the greataxe's addition photon blades became exclusively parriable by other photons (I only know this because I 1v1'd a photon blade heavy armor kit with sledge and killed them)
bro, the second myth is wrong, my friends and I once checked whether a melee weapon could block photon blades when it first came out, and imagine that it even blocks a knife, yes, a lot of time has passed since their release, but silver did not write in the update logs that he somehow changed blades .