@DarkRaider really? That's what you think I thought was a bad translation? Don't be an ass. Everyone knows "going down the rabbit hole," it's a common phrase even if you haven't read Alice in Wonderland. That was actually one of the better parts of your TL.
Probably the worst translation is...
@LegitRikk was a few conditions. Said everyone can use it for physical enhancement through training, mages can use magic items, and rare individuals can project magic within a short range without needing an item.
@Vinji you didn't miss anything, in the LN they decide to call themselves Shin's fiancees so they won't be bothered at the party. Manga adaptation decided to skip that, oddly enough.