If they spend lots of time underground, they may want to bring resources for a more sophisticated base with. If they are further along in the game, and expect to mine for a while, bring two iron pickaxes and at least 12 stone pickaxes.

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The special hazards here are that it's easier to get lost in mineshaft tunnels: they look dangerously similar, and pre-placed torches make it harder to know which places they have already explored. If players are mining in an area with sand or gravel, like a desert biome, they can break the sand or gravel blocks and see if any others fall. There can be two, three or (very rarely) even four cave spider monster spawners within 16 blocks (or less) of one another, but usually, there is at most one monster spawner in any given area. A bucket of water serves as both a fire extinguisher, if the player fall in; and as a way to form obsidian surfaces over lava pools (pour water onto a solid block adjacent to a lava pool; do not stand between that spot and the lava). If the monsters are too much trouble, the player can also go to options and change the difficulty to "peaceful" to prevent mobs from spawning.

Another good thing to bring to the nether is a piece of gold armor, as that will keep the piglins from attacking. This takes more tools (since the player is digging everything out themselves), but with proper lighting, they will hardly ever see monsters. Lighting the area around can help players know which areas they have explored and not get lost, keep monster spawns down to a minimum, and find hidden ores in the shadows. Bringing food allows the player to spend more time in the cave system, and keeping the hunger bar full is important for healing. A spare bucket is useful for collecting lava to use as fuel in a furnace, to block or slaughter monsters (the player will lose most of their drops), or just to get the lava out of the way.

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The easiest way to make an infinite water source is to make a 2×2 pit one level deep, then empty two water buckets into opposite corners. Once the player have reached diamonds, if they have an efficient style of mine at a depth where diamonds are found, they can use a diamond pickaxe, which lasts a long time and is capable of mining obsidian. If the player run out of tools or torches, the player can make a crafting table and sticks to replenish the supplies of pickaxes, shovels, and torches (players can get more coal for them from mining). Mineshaft structures are often found intersecting caves, but the player may well stumble into one of these while mining their own tunnels.Weapons: A sword (stone or better), a bow, and plenty of arrows (except if their bow has the Infinity enchantment, in that case bring only one arrow. This can be rather dangerous if blocks fall beneath players, but they can place ladders or dig their way out. A second bucket of water also lets players to create a perpetual water pool, from which they can then refill either or both buckets whenever players want. Using the debug screen (F3) ( Java Edition exclusive) or coordinates ( Bedrock Edition setting) is the easiest way to find the player's altitude.