Hostile Invisibility The juvenile glass serpent is naturally invisible. When a glass serpent takes a hostile action of any kind, it becomes visible until the start of its next turn, as its body becomes momentarily tangible. A glass serpent that has swallowed a creature becomes visible for the next day as its meal is digested. If the swallowed creature escapes or is otherwise removed, the glass serpent immediately returns to being invisible.
Ambush [reaction] Trigger A creature passes within 20 feet of the juvenile glass serpent and hasn't detected it;
Effect The glass serpent lunges out of hiding. It Strides directly toward the triggering creature and makes a jaws Strike against it. The target creature is
off-guard to this attack.