This area is characterized by walkways of which some are invisible. Snowflakes falling from the ceiling and orange guidance signs etched from other worlds can guide the player on these walkways. The player can also shoot arrows at the air, or drop Prism Stones to see if they stick. The enemies may prove to be an annoyance when on narrow crystal walkways. This makes it easy for the player to fall off with or without being hit.
Crystal Cave is a good location for farming Twinkling Titanite because it's a common drop from Giant Clams, especially with raised Item Discovery. Killing Seath first to unlock the bonfire in the boss area just next to the cave with a group of Giant Clams makes for easy farming.
- The Crystal Butterflies in the area are initially passive, but will aggro if the player attacks or gets very close to them. They will not land nor drop a special soul, unlike the Moonlight Butterfly boss.
- Getting Seath to destroy the Primordial Crystal will give the player a good opportunity to attack his tail for the Moonlight Greatsword.
- Big Hat Logan dialogue