Terraria Wiki → Underground
Once the house is built, it's time to move on to excavation. There are many digging techniques, each with its own advantages and disadvantages. For example, a straight shaft going down will speed up the process of descending into the deeper layers.
Another popular method is exploring natural caves and tunnels. If a cave system ends in a dead end, exploring the walls with a lit torch often reveals another cave nearby. This method will yield more treasure, but will make it more difficult to escape to the surface.
Biome: Underground
Enemies
- Blue slime
- Red slime
- Yellow slime
- Pinky
- Jellyfish
- Giant worm
Drops from enemies
- Gel
- Glow stick
- Fart pillow
Valuable resources
- Copper
- Iron
- Silver
- Precious stones
- Glowing mushroom
- Shimmering Root
Valuables in chests
- Recovery Bracelet
- The Magic Mirror
- Angel statue
- Cloud in a Bottle
- Hermes boots
- Enchanted Boomerang
- Jester's arrows
The Underground is the first of the underground layers. It can be identified by the texture of the back wall (see image above).
Your main goal at this stage is to mine copper and iron. Before descending to the next layer (the caves), equip full iron armor and craft silver weapons. It's also recommended to find and collect two or three crystal hearts at this level, which increase your character's maximum health. To collect a heart, first smash it with a hammer, then use the small heart it drops.
Once you reach the caves, it's time to build the fourth house, which will house the demolitionist. Around this time, it's recommended to purchase a mining helmet (unless you've already found glowing mushrooms, in which case you can replace the helmet with potions of light).
Biome: Caves
Enemies
- Black slime
- Mother of slimes
- Slime
- Pinky
- Giant worm
- Skeleton
- Bat
- Jellyfish
- Piranha
- Dead miner
- Tim
Drops from enemies
- Gel
- Fart pillow
- Hook
- Sorcerer's hat
- Robot hat
Valuable resources
- Copper
- Iron
- Silver
- Gold
- Demonite
- Precious stones
- Glowing mushroom
- Shimmering Root
- Lava
Valuables in chests
- Recovery Bracelet
- The Magic Mirror
- Angel statue
- Cloud in a Bottle
- Hermes boots
- Enchanted Boomerang
- Jester's arrows
The caves are the second of the underground layers. They can be identified by the texture of the back wall (see picture above).
Your main goal at this stage is to craft silver weapons and armor, then gold weapons and armor. Try to find a grappling hook and as many crystal hearts as possible (at least three or four).
Don't dig too deep at this stage. The next layer after the caves is the Underworld, one of the most challenging locations in the game. You may encounter monsters living there, and they're difficult to defeat even with a well-developed character. If you see fire imps, don't go any deeper. It's best to stop digging downwards as soon as you encounter the first pools of lava.
See also:
Meteorite bar (Part 1) crafting