You can find all the Relics and their parts in this Relic Hunters Legend guide. We also explained the locations of these relics, what they do and the effects they provide.
List of All Relics in Relic Hunters Legend
The Obsidian Cat
The Thunder Hammer
The Trash Heart
Disclaimer: All parts have been farmed on Imperial Era unless stated otherwise.
Info should be 100% correct, but feel free to reply with a screenshot of it on the floor or in the loot feed, with location and era i.e.