Java Edition 18w10c

18w10c is the twenty-sixth snapshot released for 1.13.

Additions

 * New water physics
 * You can place water in the following blocks: stairs, slabs, fences, walls, iron bars, glass panes
 * Water can flow out these blocks, but can not flow into them
 * When full of water, they will count as water blocks for all gameplay (such as swimming)
 * This isn't final and more blocks may contain water in the future
 * Right now it will flow out of all faces of the block - this will change
 * We have removed the blocks  and
 * We have removed the block tags  and
 * All of the above blocks now have a state
 * Blocks such as bubble column or kelp will always count as a water source

Changes

 * Phantoms are now considered undead mobs
 * This means that they are harmed by Healing potions and healed by Harming potions