It probably took around a millennium or a bit more yes. The reason for the scrap tech is that most of the previous tech blew up or became scattered into farther areas, and all that's left are the buildings of the pre-inhabitants' older era. Such a style for technology was left on the ground while more advanced models were used on the newer buildings that reached towards the skies. And yes, most of the spaceships are made using the technology from unused missiles after the cataclysm. Ah yes, it didn't happen instantaneously, I will add onto it explaining further. Since the pre-inhabitants were a proud race, they were not careful when it came to checking on their technology, someone must have planted the bug. Whether their intentions of annihilating everyone was intentional remains a mystery. It is possible that the cataclysm struck quickly throughout the solar system due to the trade vessels carrying the bug. Perhaps there are leftover trade vessels just orbiting the immense asteroid belt that now exists. Maybe some of the pre-inhabitants thought about living underground as well, though this may be unlikely due to events happening so fast. (they never expected a lightning-fast detonation.) Even then, they may have not been able to survive the post-radiation or even the unfamiliar creatures beneath the surface.
I have a suggestion for What if you could stick it into a wall then use some magnet power to call it back? Maybe it would function much like Thor's hammer with more control.
The weapon itself doesn't use any of the magnetic material, agatite. Perhaps there could be a different tool that pulls objects closer? (Like a Magnet Gun or something) Currently working on Timeline info
I think the idea was to make an item that you could throw/place on the ground then reactivate to send it back toward you, damaging anything in the way. Perhaps it could be upgraded into an item that you can throw/place, and you can activate it to either send it toward you, or you toward it, kind of as a mobility item before you have access to the Chakrams that I suggested before. Also, while you're making the timeline, consider having the Drale be at least somewhat sentient and self aware prior to the egotistic race's cataclysm. Perhaps they were even able to communicate with them and the Drale language evolved with heavy influence from the egotistic race's language, and a few might've even been able to use some of their technology. which might've been a contributing factor as to why they were capable of decoding the egotistic's language so quickly and reach space travel in a fairly limited amount of time. Not to mention that the Drale filling in around the cracks of the egotistic's ever-spreading metropolii would harden them into good scavengers and quick adapters. It would also make an interesting drama, having two intelligent and self-aware races on the same planet would be pretty interesting.
Perhaps I could incorporate it into a grapple that could act as utility as well? The current Drale have never met one of them in person, so maybe when the previous species of Drale were in captivity, they may have passed down their knowledge they obtained while there? (They were around for a long while before the cataclysm, so they probably had some sort of verbal communication before sticking to one used by all.) But of course, the idea that perhaps the egotists were not fond of the Drale and attempted to eliminate them. (Though leading to blowing everything up instead.) EDIT: Finished the Timeline and information. I'm not so sure about the exact years though. I want people to assume that it took a legitimate amount for each.
There are 100 dots on the timeline. Human existence is over 7,000,000 years old today, and we still haven't invented anything very close to space travel. I would say make each dot 100,000 years at the least, but then most of your events would be crammed at the end. Hell even split the timeline into eras, but make the era of the Drale more detailed than the others.