paulzag

Well when I see a new question AND an accepted answer I am less likely to put the effort in answering the question. YMMV

The Aliens want to eat humans because they are invasive/unchecked? Humans also impact the natural order/balance of animals and insects. While North America has lost it's huge buffalo (bison) herds, they numbered an estimated 60 Million head in 1840 vs 98.4 million cattle in 2015.

@Sirama I hope you have a great in-world reason for that vault-builder having "One and only one key, that I will never lose or break, lest my precious be trapped forever in that vault".

@Mr.ShinyandNew安宇 Thanks for the answer. I guess it's minimalist, but it does answer the question. Oh well I'm learning

Is this the right place to ask 1) why this answer was downvoted english.stackexchange.com/a/347284/194321 (not my answer) and 2) if I upvoted it would the "balance" out.