Episode 21

Maxing Defense and Setting Up a Base is the ninth episode of the second season of the BOFURI anime series.

Summary
Within the Maple Tree HQ, Dorazou announces the start and the rules/information associated with the main part of the eighth event. Once that was over with, the Maple Tree members were teleported to where the event was being held.

Immediately, the members are ambushed by two Desert Caterpillars, which surprises Maple that they don't get KOed in a single blow. However, Iz mentions that they are in the highest difficultly area, though in the end, they still manage to defeat the Desert Caterpillars through their combined efforts. While Mai notes how strangely strong Yui and here were, Kanade reveals that he had Sou copy Mai's appearance and skills. Because Sou added an extra hit to their attack, the twins Double Strike became a Triple Strike.

After Kanade explains a bit about Sou's transformation ability, Sally reveals they didn't receive any medals from the Desert Caterpillars they defeated. Kasumi assumes that they must have been the weaker monsters in the event. From Sally's assessment, the Guild's goal was to earn ten medals so they could trade in for new skills. Kasumi suggests that they split into two groups to achieve their goal better, and Sally, Yui, and Mai team up with Maple while the remaining team up with Kasumi.

It's decided that Kasumi's team will cover the forest lands, while Maple's team will cover the wetlands. Kasumi's group rides on Haku to their destination, as Maple's group rides on Tsukimi and Yukimi to there's. Sally also shares her map with both groups of suspicious locations she found during her scouting trip in the preliminary event. Spotting a marked place in the wetlands, they decide to head there.

Upon reaching their destination, they find a giant flower surrounded by a muddy moat with Mud Ghouls and Ice Golems in it. The group avoided the monsters by riding on top of Syrup, but getting close to the flower teleports the group into a hidden area. Within the new location, they're ambushed by a group of Mud Ghouls that Mai and Yui defeat with their new projectile abilities, earning them their first medal.

Meanwhile, Kasumi's group receives a notification that Maple's group has earned a medal and nearly reached their destination within the forest. Locating a tree with a spell crest on its front, Kasumi has Haku touch the crest that teleports them somewhere. There, they all summon their respectful companion and are ambushed by someone throwing explosive shuriken at them.

At first, Chrome protects them with his shield, but Sou further protects them using its body as a barrier. Iz then uses a healing potion on Sou as thanks for its noble deed. Chrome deduces their enemy is an Invisible Ninja; hence Iz sets up numerous traps in the surrounding area, which scorches the surrounding area. Kanade then uses the spell Searcher's Sun, revealing the Invisible Ninja's location. Kasumi and Chrome then attack and defeat the Invisible Ninja, earning them another medal. Once that was settled, Kanade suggested they regroup with Maple's group as it was nearing nightfall, and stronger monsters were said to come out then.

Afterward, the two groups reunite at a dummy dungeon. Once they investigate the place, it's decided that they'll establish a base for themselves there. For starters, Iz crafts furniture, Kanade, Mai, and Yui sets up defensive traps, leaving the rest to work on their projects.

Eventually, Iz manages to redecorate the main area with a highly classy appearance alongside some cannons. When nightfall arrives, a Flying Imp along with some other unknown high ranking monsters triggers several trap and dies. Sally and Maple then re-set up more traps and return to the base, where guild members then play a game to pass the time. As this goes on, the Administrators learn that the Congregation of the Holy Swords and Kingdom of the Flame Emperor guilds have done optimally well surviving the event. However, they're left speechless by the dungeon they created that was far more dangerous than the ones they created. Despite their assistant showing them a live feed of Maple's group enjoying themselves, the Administrators assured the assistant that stronger monsters will appear.

Characters

 * Dorazou
 * Kasumi
 * Iz
 * Kanade
 * Sally
 * Yui
 * Mai
 * Chrome
 * Maple
 * Syrup
 * Oboro
 * Tsukimi
 * Yukimi
 * Haku
 * Sou
 * Necro
 * Fay
 * Administrators

Mobs

 * Desert Caterpillar
 * Mud Ghoul
 * Ice Golem
 * Invisible Ninja

Bosses

 * Flying Imp