Summary of events:
- Try ‘The Fading Brink’ for first time, and die somewhere short before the end.
- Retry the same area/node after respawning.
- Kill the first two or three Harbinger that spawn.
- Suddenly, two Harbingers spawn simultaneously.
- From this point on, every time a single one is killed a new one spawns, resulting in a long 2v1 Harbinger arena.
- When fighting the last two, the Echo completes when killing the last (?) Harbinger, but what would probably have been the second to last is still alive.
- Kill the last Harbinger, and finally unclench your sphincter.
Note: The Weaver tree node ‘Twinned Tyrants’ was not allocated, and the spawned Harbingers had different movesets.