There are multiple types of legendary artifact in STALKER 2, and they all provide effects that are typically much stronger than regular ones. However, as their category implies, these artifacts are either very rare, or found only in very specific parts of the Zone. Below is a full list of every legendary Artifact in STALKER 2, including the ones that are exclusive to the CNPP and Iron Forest areas from the Cost of Hope DLC.
Provides maximum Physical Protection
Provides maximum Thermal & Bleeding Protection
Provides maximum Radio and Chemical protection
Reduces incoming bullet damage while standing still
Reduces damage from anomalies when charged
Makes you harder to detect for 300 seconds
Rapidly heals Bleeding, but slows down healing
سەرچاوەی فەرمی بە زمانی ئینگلیزی: https://gamerant.com/stalker-2-all-legendary-weird-artifacts-effects-locations/