The Altar of Ivanuris in "Dragon Age: Shadowkeep" is a very useful thing in the game that can increase the upper limit of health. If you want to use the altar, you can look for tall statues holding shields. They are usually hidden in Puzzle after puzzle, and always some exploration.
How to use the Altar of Ivanuris in Dragon Age 4
The Altar of Ivanulis can be found in every region in the game. Finding them increases location completion, and each altar adds 100 health points to your health bar.
What you're looking for are the tall statues holding shields, which are usually hidden behind puzzles and always require some exploration. Once you interact with one of them, four spinning icons will appear nearby, magically revealing their locations. You need to destroy these four icons before the altar will grant you an additional 100 health points. There are many such altars in the game, so this is the most reliable way to increase your maximum health.