SCP-025-FR, or "Deadly Silence", is an upcoming SCP in SCP: Containment Breach Unity Edition that will be added in an as of yet unannounced update.
SCP-025-FR is believed to be a parent species of the Arthropleura. SCP-025-FR measures five meters long, and possesses the ability to ‘absorb’ sound waves around it; the frequencies it can ‘absorb’ range from 20Hz to more than 50kHz, outside the range of human hearing. SCP-025-FR is also able to emit these sound waves to protect itself when threatened; these waves function similarly to an LRAD at 162dB, and have been shown to stun.
When SCP-025-FR is hunting, it digs tunnels, detecting its target by emitting sound waves similar to echolocation used by Phyllostomidae, otherwise known as the leaf-nosed bat. Once close to its prey, the entity absorbs all surrounding sounds it and its prey are causing and, within a few milliseconds before attacking, will emit a sound wave that will paralyze the target for a range of two (2) to four (4) seconds.
Once out of its tunnel system, SCP-025-FR will bite its prey with its outer mandibles, injecting botulinum toxin that will paralyze and kill the target by a total stop of cardiac functions, before dragging it into the tunnel network to consume them safely. SCP-025-FR is highly receptive to every form of high-frequency noise, and is attracted to them. As long as these sources are active, SCP-025-FR will try to find them, ignoring everything else, even potential prey.
SCP-025-FR is not currently in-game