Borderlands 4 Evocarium Guide: Locations, Rewards, & How To Complete
via screenrant.com
Short excerpt below. Read at the original source.
There are quite a few different types of collectibles in Borderlands 4, and though they aren’t strictly required to complete the game by any means, players will benefit from tracking them down for the various upgrades and rewards they provide. Evocariums are one such collectible type with a unique twist.