I was playing around to see if some old glitches still existed (tnt dupe, ghost blocks) until I found this. This set-up allows you to delete slime blocks completely with good timing. In certain cases, I was able to create a slime block that couldn't be destroyed, even in creative mode, although I couldn't catch that in my recording. The file is too big so I'll send the video file via link. Minecraft 1.19.4 Pre-release 1 - Singleplayer 2023-02-23 10-01-35.mp4 - Google Drive