Even when Baldur's Gate 3 was in early access, gamers noticed that Phase Spider Matriarch was a rather difficult boss. Players need to be well-prepared for the battle with it, considering all the difficulties that may be encountered. In Whispering Depths, where Spider Matriarch can be found, it is dark, and therefore all characters without darkvision will receive Disadvantage unless they cast some light spell. There are also many spiders that spawn there that have a lot of health and can teleport to characters.