Thread:KodachiZero/@comment-28010705-20170207154504/@comment-3215051-20170712124308

The new sword is literally: 忌 - Heretic 神 - God 乃 - Source 魂 - Soul 刀 - Sword

We decided to just shorten it by a lot into "Sacrilegious Blade" because it more or less gets the same meaning across. The name itself is just basically "Hey, this sword is from a Demon Raid! That means that it's evil!"

Reinritte's weapon is hard, we also were trying to translate it earlier and came up only with La Palette which is, like you said, unfitting. In contrast, Zalburis' weapon was really straightforward for some reason. [Kodachi]