Isobu

Observed progression

1. Obtain Isobu’s Soul and arrange the sealing attempt; the playthrough implants it after additional age-ups.
2. Train activations to reach Stage 2, then repeat the berserk-and-sealing stage.
3. Obtain the Beast Key, enter the inner fight and defeat Isobu. The playthrough completes it with outside support and obtains Isobu’s Cloak.

Use the shared preparation guide

Remaining encounter gaps

The inspected playthrough does not establish a reliable world-arena landmark, spawn timer, soul drop probability or exact Isobu-specific counter thresholds. Those values are intentionally absent rather than borrowed from Shukaku.

Video walkthroughs

Jump to the relevant step in the original guide. Check pinned corrections when using an older video.