Rarity

Judging from the sparse data we have in this thread, it would take about 150 or so spawns to get enough scraps. That's 150 game days or 90 hours, or 3 and 3/4 days straight. If you spread out your play time across the entire three weeks (I'm assuming 21 days), you need 7-8 spawns/game days per real life day, which is about 4-5 hours per real life day. It's doable, but you're going to be pretty much doing nothing else. I wonder if anyone is dedicated enough to finish.