Episode 24

Maxing Defense and the Big Final Battle is the twelfth/final episode of the second season of the BOFURI anime series.

Summary
The newly spawned monsters for the third day of the Eighth Event invade the base as the three guild teams escape while defeating the monsters on their way to the outside. They all escape by riding on their guild leader's Monster companions.

Finding a haven on top of a flat surface within the mountains, Sally shows everyone that the map has shrunk again. To better fortify the area, Iz set up traps around the area and was followed by Chrome and Kasumi, and Marx did the same along with Misery and Shin.

Just then, the final boss Cthulhu appears, causing a massive stir amongst the surviving players, and summons meteors from the sky. Maple protects everyone by using Aegis and after witnessing multiple players perish from the boss' attacks. Maple suggests they rescue the players in peril, and everyone agrees to do it not only because of its merits, but also to have a better chance at defeating the boss.

Splitting into groups aligned with their guilds, Maple's group decides to take on the final boss head-on. Sally deduces its glowing spot is the Boss' weak point and suggests they do their best to whittle down its HP. They start by cloning Maple in her Atrocity who proceeds to climb up the Cthulhu's body and eat it.

Meanwhile, Mai, Yui, Yukimi, Tsukimi, Chrome, and Necro ride on top of the main Maple onto the Cthulhu. Mai and Yui launch attacks against Cthulhu; Chrome protects them, bringing the Cthulhu down to its knees. Riding on top of Haku; Kasumi, Kanade, Sally, and Iz, then launch their own attack against the Cthulhu, which retaliates by firing off laser beams from its body. Doing this reverts Maple back to her true form, and the Cthulhu summons more meteors, but Kanade protects them all with his spells.

Before escaping, it fires off a laser beam from its mouth, and although gone from the scene, Maple in her mech form and Sally rode on its back. They manage to ground it in a forest, where the Cthulhu tries to fire another laser beam attack at them; however, Maple protects them with her body. The attack reverts Maple back to her base form again, and it does another meteor shower attack.

Just then, the Flame Emperors and the Holy Swords arrive at the scene and attack the Cthulhu. They weaken the Cthulhu enough through their combined efforts, and Maple lays the final blow against it.

After the Cthulhu was defeated, Dorazou appeared and announced that those who survived the event were awarded five medals and looked forward to the eighth level's opening.

The Administrators all lamented that their Code Alpha monster was easily defeated. They also complain about the medals awarded to those who survived the last event and the modifications needed for the eighth level before its launched. The assistant cajoles the frustrated administrators for their hard work and promises to negotiate with the top brass for better pay and treatment toward the Administrators. However, she notes that they may not listen to her.

At the Maple Tree guild base, Sally and Maple discuss successfully collecting many medals. The two then go on an excursion to various places and, in the end, stop at the hub town of the level, where two groups of players target them as potential future rivals.

Characters

 * Dred
 * Mii
 * Payne
 * Drag
 * Frederica
 * Shin
 * Marx
 * Misery
 * Mai
 * Yui
 * Yukimi
 * Tsukimi
 * Maple
 * Sally
 * Iz
 * Kasumi
 * Chrome
 * Necro
 * Christmas Rose
 * Ignis
 * Syrup
 * Ray
 * Clear
 * Shadow
 * Kanade
 * Bell
 * Sou
 * Fay
 * Haku
 * Earth
 * Wen
 * Oboro
 * Knots
 * Dorazou
 * Administrators
 * Velvet (debut)
 * Hinata (debut)
 * Lily (Debut)
 * Wilbert (Debut)

Mobs

 * Demon Queen

Bosses

 * Cthulhu