Vladimir Putin is set to launch a new submarine capable of carrying devastating nuclear-tipped combat drones that could cause a "radioactive tsunami".
Russia is continuing to develop advanced weapons as its stuttering invasion of Ukraine rumbles on beyond six months.
Its navy lacks dependable aircraft carriers - but it makes up for that with a robust submarine force, with its latest offering being able to be equipped with the most modern missiles.
The K-329 Belgorod is an Oscar II-class guided-missile fast attack vessel - the biggest built by Moscow in 30 years - and was first introduced to the public at an event in Severodvinsk on July 8.
It is currently assigned to the Main Directorate of Deep Sea Research, with various testing still ongoing.
The vessel is able to carry the planned Poseidon nuclear-armed torpedo, with six set to be put onboard.
The torpedo is described by some experts as the weapon the US navy fears the most.
While Russian propaganda news outlets have described the Poseidon as being able to "wipe Britain off the map" in a "radioactive tsunami", reports 19fortyfive.
The weapon is 80ft long and can travel at a reported speed of 108 knots, reaching a depth of 3,200ft.
It is also alleged to have an unlimited range and be able to cause an underwater two-megaton blast.
However, it is said to be still some years away from deployment.
Referring to the possible impact of the weapon, the news outlet adds: "The real objective would be to coat wide swathes of the surrounding coastline with radioactive fallout – an enduring and difficult-to-remediate hazard of underwater nuclear detonations.
"The submersible delivery method would circumvent (American) missile-defence capabilities.”
The Belgorod is also supposedly able to act as a carrier for underwater vehicles and act as support for a mini nuclear-powered spy sub for sabotaging undersea cables.
Russia's attempts at developing mini-subs before have ended in tragedy and this may well be just propaganda to give its people the impression of an unstoppable military might.
The Losharik (A-12) was deep diving manned submersible that suffered a battery explosion in 2019, killing 14 people on board, reports USNI News.
The Belgorod is 549ft by 49ft in size and boasts two nuclear reactors, with trials having been ongoing for three years with reports suggesting it is ready to be dispatched on patrols.
US Admiral John Aquilino confirmed in May that the sub would be equipped with the Poseidon.
