You have resistance to the following damage types if there is at least 10 feet squared of the corresponding type of terrain within 40 feet of you.

Acid - Grassland
Cold - Ice or Snow
Fire - Flames or Lava
Force - Stone
Lightning - Water
Necrotic - Dirt or Soil
Poison - Sand
Thunder - Forest or Jungle

Additionally, you have resistance to Radiant damage while in sunlight, and to Psychic damage while in moonlight.

Item and image made by @emsulpts on Instagram.

Notes: druid, Buff, Jewelry, Headwear