"Eternal Time" is a very high-quality Secondary Stone, which tends to have stable time properties when unearthed.
It's like any game zone, where the rules of time and space inside are very stable and not easily destroyed, even with the influence of Space-Time Items. Therefore, it can be said that such stable spaces are tolerant, or compatible, with any Space-Time Item.
Secondary Stones like "Eternal Time" can be seen as a very small version of such Space-Time structures, which can interact with other Space-Time Items' effects as an independent entity without being affected. This is similar to how Xu Huo is unaffected by Time Force after wearing "Three Seconds of a Lifetime."
Of course, such Secondary Stones can also be used as materials for props, but since they can be used directly, creating props may not achieve such magical effects. Therefore, many players simply use them as Defense Props to prevent being affected by other players' Time-related Items in special circumstances.
