I got the amiba but it did not kill me so I don't know.
amibas are little tiny creatures. and we know have them because scientists wanted to figure out if they are real of not.
It really depends on how long it will take to kill each one.
It can take as little as a few hours.
jerk!
a fortnight
about 13 days
About 1-2 weeks
years
3 days
about a second with a 30.30 lol
Some marines in the Pacific during WW2 said it took as long as 20 seconds for it to kill Japanese.
It would take 10 to 20 min. to kill its pray. It also depends on what the pray is too.