It seems you're describing a hypothetical OnePlus smartphone, possibly the OnePlus 12, with specifications such as a "Silky Black" color variant, 12GB of RAM, and 256GB of storage. While there hasn't been a OnePlus 12 released as of my last update in January 2022, OnePlus typically releases new smartphone models annually, so it's plausible that a OnePlus 12 could be released in the future.
Based on the specifications you provided, it sounds like a high-end smartphone with ample RAM and storage, likely offering top-tier performance for multitasking and storage-intensive applications. The "Silky Black" color suggests a sleek and stylish design, which is a hallmark of OnePlus devices. However, without official confirmation from OnePlus, these details remain speculative.