The Crest of Courage

'''After aimlessly following the arrow on the Digivice, and  reach a castle. There, Tai is separated from Agumon and is thrown into an unfamiliar world by a mysterious Digimon.'''

Summary
Joined by Sora and Biyomon, Tai and Agumon soon reach a castle guarded by a Knightmon, who steps aside to allow them entry. However, an apparaition suddenly appears behind them and separates Tai from the others before revealing himself as the spirit of Valkyrimon, who perished in the ancient war. He skewers Tai with his sword while instructing him to show his true power, then Tai awakens in a desolate forest under a blood red moon, unable to reach the others.

He soon encounters a Botamon being threatened by a Goblimon and helps it escape the pursuing Goblimon. As Tai and the Botamon go to find his friends, Tai recognizes the bird from his vision, but is chased into a river. He's quickly chased out again by a Seadramon, who gives up pursuit after Tai reaches dry land.

The Botamon wakes Tai up and he sees the same bird again. He follows it but is attacked by a pair of Allomon, so taking a desperate gamble, Tai has the Botamon cover him with its bubbles to get through the Allomon's flames, but is cornered again. Tai tells the Botamon to go on without him while he tries to distract the Allomon, showing true courage. This causes Botamon to divivolve to Greymon via the Crest of Courage and take out Allomon in one strike, which simultaneously shatters the sword Tai had been skewered with. Tai finds himself back before Valkyrimon, who explains that during the ancient war, WarGreymon and MetalGarurumon perservered and were able to DNA digivolve into Omnimon in order to finish off ZeedMillenniummon, and thanks Seraphimon and Ophanimon. Valkyrimon also informs Tai that the power in his heart that summoned Omnimon while fighting Nidhoggmon would be vital to defeating the Great Catastrophe, then returns him to Agumon, Sora, and Biyomon. Tai's Digivice notifies him that he has completed his trial to unlock the Crest of Courage, and he ponders what he was told by Valkyrimon.