Plot device
anything which moves the plot forward or maintains it
suspended animation in fiction
plot twist
Plot point
time loop
One Ring
mind uploading
Big Dumb Object
Deathtrap
dream world
alien space bats
babies switched at birth
body swap
catastrophe
Dangler
red herring
Meet cute
Mr. Know-It-All
plot generator
quibble
reset button technique
reveal
quest
shoulder angel