Battle of Hell's Armies

The so-called Battle of Hell's Armies is the test to enter the third layer of the labyrinth under Kimberly Magic Academy from the second.

Background
The Battle of Hell's Armies consists of two forces of undead warriors who eternally reenact the Battle of Diama between the ancient nations of Rumoa and Kurtoga. Mages who wish to enter the third layer of the labyrinth must, once per year, help the Kurtogan army, who lost the historical battle, win. Students who have previously completed the test that academic year are not allowed to assist newcomers.

In 1532, while attempting to rescue Pete Reston amongst several students kidnapped by Ophelia Salvadori, the Sword Roses attempted the test. They defeated the Rumoan cavalry charge by using toolplants supplied by Guy Greenwood to construct a barricade to guard the flanks of the Kurtogan infantry, creating an opening for Nanao Hibiya to lead a (literal) decapitation strike against the opposing general.

It was also possible to simply brute-force the test. In 1534, the entrants to the senior-year preliminary round of the combat leagues, led by Alvin Godfrey and Leoncio Echevalria, arrived at the Battle of Hell's Armies to discover that Professor Vanessa Aldiss had single-handedly destroyed both armies while waiting for them.