Deeply Hidden Riches
Biome Effect
You have found all available 
Thunderblight Shards.
Deeply Hidden Riches
- Receive a Thunderblight Shard after using 40 mining vein charges (copper, coal, or salt)
- Receive a Thunderblight Shard after using 80 mining vein charges (copper, coal, or salt)
- Receive a Thunderblight Shard after using 120 mining vein charges (copper, coal, or salt)
- You have found all available Thunderblight Shards