How to finish Blood Altar quest?

[Ray]

I started it up and got killed by the last beast, and when I returned I need four more beast but am unsure as to how I am supposed to capture more.

[Ray]

Anyone?

[Psyringe]

I've seen a number of threads about this topic, but I'm not sure if there is an actual bug or if the game just doesn't communicate clearly what it expects the player to do.

I would assume that the captured beasts from your failed encounter are gone, so you'll have to wait until Einhar spawns again. Unless there's a bug specifically with failing the first Blood Altar encounter, Einhar should now have a small chance to spawn in every new area you enter. If he spawns, the two of you can hunt and capture new beasts. With these new beasts, you should be able to try another Blood Altar fight.

I can't talk from experience though, I haven't been in this situation myself.

[Rogue]

Einhar will randomly appear on maps and you can capture those beasts then. Otherwise, you have to reach atlas and do the daily quests which has a guaranteed Einhar quest( But you still need the map where he appears)

Completing blood altar gives nothing anyway. Just keep progressing, you'll get it eventually.