Ive had a few players ask about this one. You'll need to wrap up some storylines first, finish the artemis path through the purge, complete the atlas stuff, and make sure you've done they who returned with the autophage completely. Once that's sorted, the process is pretty straightforward but timing matters here. After leaving any station or planet, engage your pulse drive and drift for about 8-10 minutes - you're watching for a specific divergent signal alert thatll pop up.

Getting the blueprint itself is actually halfway through the quest chain that triggers, but here's a useful detail, when crafting the memories component you'll need exactly 3 echo seeds and a quantum computer, so maybe grab those materials early. The quest guides you through gathering them but having them ready speeds things up.

The tricky part comes with the timing of that initial pulse drive section, since some players miss the signal if they're not paying attention. Once you've got everything installed though, you can immediately start warping to any purple star systems you spot, just keep in mind that if you're on console there's a known issue with screen blackouts near gas giants, so approach those carefully. These purple systems are pretty interesting actually since they're packed with stuff like gas giants and water worlds you won't find elsewhere in normal space.

Really important point about that autophage storyline, double check with nada in the anomaly that you've actually finished it completely, since that's a common hangup that'll stop you from progressing.