x, rule = B3/S234iw
3o$o2bo$2b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
This is not a simple bookend. This is an alien spaceship.
(click above to open LifeViewer)
The bookend is a 7-cell induction coil.
It can also be seen as an R[1] version of the claw.
In rule B3/S234iw, it is a spaceship.
See also
References