It's my Doomsday Nuke. Just unpause it and watch it go BOOOOOOOM!!!!! Any simulation that anybody has ever created in TPT will be utterly destroyed by this, leaving behind only walls, DMND, and anything lucky enough to not be hit by the enormous quantity of BOMB particles emitted when this device explodes.
Feel free to copy it and use it in your simulations.
Here's my upgraded version. It explodes sooner by about 1/10th of a second than my previous nuke (when running it in its own sim, as there are no other particles to slow it down, but may be an improvement by up to 1 second in simulations that have a lot of slowness already). Again, feel free to copy it and use it in your own simulations.
Increase in speed comes from the fact the shattering pressure is now caused by the THDR, not the slower exploding DEUT. Previously the DEUT had to "get out of the way" before there was room for other particles and thus it actually slowed it down.