No Real Gods
Rare8.4%Drew out the latent magic in every Altar of the Evanuris.
You must visit and activate all 29 altar locations; each of which is a statue of a Dread Wolf - and grants you either a skill point (Fen'Harel Altars) or +100 max health (Evanuris Altars) for each you interact with (helpful for 
You'll hear a howl when you get close to one. Interact with it to rotate it, and trigger a short action to complete; either shooting down flying puzzle pieces or finding blue mini wolf statues (depending on the altar type).
Keep an eye out and tick these off as you progress the game, albeit some are not accessible until pretty much the end of the story (and require completion of most side quests) so it'll be a late-game unlock.
See the linked Altar Locations guides from Gamespot below, which has descriptions and screenshots for each - and the checklist which has the altars in the same order as the linked guide.