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Minecraft 18w10c
Java Edition 18w10c.png

Java Edition



Release date

March 8, 2018

Snapshot for



Client (.json)

Protocol version


Data version


18w10c[1] is the twenty-sixth snapshot released for Java Edition 1.13, which added waterlogged blocks.



  • New water physics.
    • Water can be placed in chests, trapped chests, stairs, slabs, fences, walls, iron bars, and glass panes.
      • Water can flow out these blocks, but cannot flow into them.
      • When full of water, they will count as water blocks for all gameplay (such as swimming).
      • Water will flow out of all faces of the block.
    • Removed the blocks flowing_water and flowing_lava.
    • Removed the block tags water_hacked and waterlogged.
    • All of the blocks that water can be placed in now have the block state waterlogged.
    • Blocks such as bubble column or kelp will always count as a water source.



  • Are now considered undead mobs.
    • Are now harmed by Healing potions, healed by Harming potions, ignored by the wither, and affected by the Smite enchantment.


17 issues fixed
From released versions before 1.13
  • MC-109829 – Observer keeps re-triggering when water observed
From the 1.13 development versions
  • MC-122171 – Sponges suppress updates, can cause crash
  • MC-125216 – Graphical glitch: some water faces not rendered on and near hacked water
  • MC-125417 – Real water above hacked water doesn't render when there is no other water rendered in the same chunk
  • MC-125467 – Lily pads can't be placed on hacked water
  • MC-125479 – Hacked water blocks with a collision box allows breathing
  • MC-125594 – Fishing rod bobber falls down into the sea grass, kelp, coral and waterlogged block
  • MC-125596 – Fishing rod cannot catch fish when the bobber is in hacked water
  • MC-125662 – Real water doesn't connect to hacked water
  • MC-125845 – Hacked water doesn't hydrate farmland
  • MC-125846 – Sugar cane cannot be placed beside hacked water
  • MC-125870 – Hacked water does not extinguish burning mobs
  • MC-125890 – Bucket and bottle don't work on hacked water
  • MC-126137 – Waterlogged blocks don't help create new water source blocks or react with lava
  • MC-126567 – Phantoms despawning in day with PersistenceRequired
  • MC-126571 – Large Ocean Ruins reuse the same LootTableSeed tag multiple times, making nearly all loot the same.
From the previous development version
  • MC-126868 – Dead coral variants have incorrect names, <Color> Dead Coral should be Dead <Color> Coral


Video made by slicedlime:


  1. "Minecraft Snapshot 18w10d" – Minecraft.net, March 6, 2018