A Chronosapien Time Bomb is a powerful weapon of mass destruction designed to wipe out timelines and realities throughout the multiverse, similar to how the Anihilaarg is capable of wiping out an entire universe in one fell swoop.
It bears resemblance to a Chronosapien head.
In And Then There Were None, over 200 years later from Vilgax's point of view, he would activate the Time Bomb in the No Watch Timeline to erase every other version of Ben Tennyson and their timelines from existence.
When a Chronosapien Time Bomb is activated, it will unleash a blast that will entirely wipe out targeted timelines in the multiverse along with anyone or anything from them. The Time Bomb can apparently be programmed to either wipe out all of the timeline it is currently in according to Eon, or to leave that dimension untouched and erase the rest of the multiverse according to Vilgax.
The Chronosapien Time Bomb leaves a temporal ripple detectable to Chronosapiens, allowing a Chronosapien to completely reverse the Time Bomb's effects by using their time powers to suck the ripple back in.
The effects of the time bomb can be temporarily nullified by rebooting the Timestream.