77 Rings

The 77 Rings (７７) was a challenge held for knights in Windknight's Lot during the Middle Ages. Known to freeze the blood of any man, the challenge served as a training method. Only five knights in history have completed it.

The Trial
The challenge consists of crossing a 10-kilometer mountain range via stairs and roads. On the way, the knight must not only surpass cliffs and rivers, but also defeat 77 opponents in a series of fights to the death. Each of the 77 opponents carry a bracelet or anklet, which must be taken by the knight and worn for the duration of the challenge. Individually, these rings aren't heavy, but the combined weight of all 77 rings is more than a hundred kilograms. All but five knights have failed the challenge, with most having their skulls collapse from the rings' pressure. Of the five winners, Bruford was the only one to not possess a strong build, preferring to instead utilize his Danse Macabre Hair.