Relic

I found a mob that had relic in its name I killed it and it drop a undefined set item, I undefined it and it was this then I found a undefined set item in my inventory, I undefined it and it was this ????

 

it's a rare mob
you kill the rare mob
you get a rare item

 

but the wynndata said
This item can no longer be obtained.

• Reason: Removed feature

 

they re-added it in 1.18, wynndata isn't updated yet

 

and the second item appearing after I undefined the relic boot

 

it drops 2 i think (i got 2 from it too so)

 

Ive seen some that drop 3
On a side note there are 4 guardians that drop their respective armor pieces.
Savannah for boots
Desert for Helmet
Mesa for Chest
Nesaak for pants (currently bugged I think)

 

The mob is called "Relic guardian" and i have myself found the one in nesaak, it seems to spawn more reliably if you wait around the sawmill, it tended to spawn around some trees.