I have seen many saves that use DRAY bombs (bombs that self-replicate until they fill the entire screen), and I noticed that DRAY is able to overlap (and destroy) diamond. Using the technique of using DRAY to overlap diamond, I created this.
How it works: The two PSCN spark ARAY, creating 2-life BRAY. Immediately after, DRAY is sparked with PSCN, overlapping the DMND with the 2-life BRAY. The bray fades away, leaving nothing.
Edit: updated ID
A better word would be "overwriting", since overlap suggests stacking, but no stacking happens in this save (except you have some stacked piston...).
Sparking DRAY using PSCN will cause it to delete all particles at the destination (which yes, does currently include diamond) before copying the source object there.
actually you dont even need the bray at all. if you set the tmp of the DRAY to 4 and leave 4 empty spaces in front of it then the DMND will be overwriten with 4 empty spaces.
like this