Shardgrass

Shardgrass
  Type: Crystal-like Plant
  Environment: Deserts or planar rifts.
  Appearance: Shardgrass looks like tall, glass-like blades that reflect sunlight in a dazzling display. Each blade hums faintly when touched, and it is razor-sharp.
  Properties & Effects:
  Cutting Blades: Walking through an area of Shardgrass counts as difficult terrain, and creatures take 1d6 slashing damage for every 10 feet they move.
  Solar Focus: If properly harvested (DC 14 Survival check), the grass can be used to craft magical lenses for fire-based spells or devices like Sunstones.
  Resonance Effect: When exposed to thunder damage, the grass amplifies the effect, causing all creatures within 15 feet to take an additional 2d8 thunder damage.