The Z-Class Atomic Bomb is an ancient weapon of a long forgotten civilization. The ultimate combination of magic, artifice, and science in a sphere of pure destruction. The knowledge of such an item and the civilization that birthed it has been lost to time. It is whispered in only myth and legend of a war using such a weapon that annihilated its creators. Buried in the ruins of the past serving as the only reminder of a people and its history. A testament to their determination to shape their world and the arrogance that destroyed it.

The bomb is a 10ft by 10ft sphere of lead plating shaped in octagons and pentagons covered in a forgotten language detailing its usage and purpose. There are two key pads on the sphere with inputs that include strange unknown symbols and numbers.

By inputting a specific series of button presses into separate key pads the atomic bomb can be detonated. If the code required to activate the Z-Class Atomic Bomb is discovered (the DM determines how), it requires two creatures to spend their actions performing the command.

If the code is successfully implemented, a 1 minute (10 round) count down is initiated. The detonation sequence can be stopped before the timer reaches zero by preforming a successful DC 25 Arcana check to determine the proper way to deactivate the atomic bomb followed by a successful DC 25 Sleight of Hand (Theives Tools) check to defuse the weapon. If the count down reaches zero (end of the 10th round) every creature in a 3-mile-radius sphere centered on the bomb must make a DC 25 Dexterity saving throw. On a failed save, a creature takes 87 (25d6) fire damage, 87 (25d6) force damage, 87 (25d6) radiant damage, and 87 (25d6) thunder damage. On a successful save, a creature takes half as much damage. Objects and structures in the area take triple damage. Creatures that are reduced to zero hit points by the blast die instantly and leave behind no remains. The Z-Class Atomic Bomb is destroyed in the explosion.

For a period of time after the explosion (determined by the DM) dependent on weather, geography, and the area destroyed, a 10 mile radius is irradiated by the fall out of the explosion. A creature that spends an hour within the zone must make a DC 15 constitution saving throw or gain one point of exhaustion as the radiation from the atomic blast destroys living cells and breaks apart DNA. Regardless of a pass or failure an affected creature must make the save every hour they remain in the area.