Your cursor will often change or a tooltip will flicker when hovering over a secret element.
Watch for "cracks" in the UI or parchment that looks slightly different from the rest of the background. GemCraft - Chasing Shadows
They reveal the location and entrance requirements for the final hidden hex. Your cursor will often change or a tooltip
You typically find them by clicking specific, seemingly decorative elements on the world map or within individual fields. 📍 Where to Find the Fragments GemCraft - Chasing Shadows