Requires Newtonian Gravity.

This little boy stands at 102 pixels, yet has enough firepower to destroy entire city saves! It is the smallest, most compact, most powerful, radioactive remote bomb I have ever made. I've been testing it on many saves ever since it went onto my stamps. Cities and terrain all turn into 5000°C pools of lava in its wake. Works best on powder landscapes; it deals massive damage to solids, but not as much.

Sometimes the spilled deuterium explodes by neutrons instead of protons, and you get a fusion show.