Xiloscient's Scintillating Sand Trap

You create a 15 foot area of ground where a number of small gemstones are visibly glowing and sparkling just above the ground. If a creature in the area touches any of the gemstones, the gemstones vanish, the ground beneath their feet turns to quicksand, and all creatures in the area must make a Dexterity saving throw. On a failed save, a creature sinks into the quicksand and is considered restrained by the sand trap until they succeed on a Strength (Athletics) check against your spell save DC to escape the trap.