Feasibility of creating an explosive life form

My race of space-going sentients want to weaponise a life form which is explosive in an oxygen-rich environment.

To do so, they have access to any planet they care to use, terraforming, and the ability to change the atmospheric makeup of the planet.

How would they go about creating and breeding this life form?

The solution that I have found so far is boranes:

Boranes are dangerously explosive in Earth's atmosphere, but would be more stable in a reducing environment. However, boron's low cosmic abundance makes it less likely as a base for life than carbon.

This is from Hypothetical types of biochemistry. Would a multicellular organism built from mostly boron be able to support life? Would exposure to oxygen be possibly fatal due to the risk of igniting? How would it respire, if oxygen is a possible danger to it? How would it be maintained? What would it look like?

posted almost 7 years ago

Aric‭

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