Freezing water

Freezing water is water in cold biomes that hurts players in Matcha Flavoured. A player whose head is underwater in a frozen biome is slowed, blinded by  Darkness, and takes freezing damage until they get out or wear a chestplate enchanted with Frost Protection.

This page also covers the pack's other water hazard, water in Hell.

Mechanics

Every tick, the pack checks every player who is not in Creative or Spectator mode. If the block at the player's head is water, the player is standing in one of the biomes below, and their chestplate is not enchanted with Frost Protection, the player is given:

•  Slowness V for 5 seconds;
•  Darkness for 5 seconds;
• 1 point (1 ( × 0.5)) of freezing damage.

The effects are reapplied every tick while the player stays under, so they last 5 seconds after the player surfaces. The damage is applied every tick as well, but the normal damage cooldown after a hit limits how often it actually lands.

Freezing biomes are those in the pack's #minecraft:is_frozen biome tag: frozen ocean, deep frozen ocean, frozen river, jagged peaks, frozen peaks, grove, snowy slopes, snowy taiga, snowy beach, snowy plains and ice spikes.

Only the head matters: wading, swimming at the surface with the head above water, or riding a boat is safe.

Protection

Any level of Frost Protection on the chestplate makes the player immune. Frost Protection also reduces other freezing damage, such as from powder snow, by an amount that grows with its level.

Water in Hell

The pack lets water exist in Hell: the dimension no longer evaporates water, so water can be placed with a bucket and flows. Water is only allowed above the roof. When a player empties a water bucket while they are in Hell between Y=0 and Y=127, every water block within 20 blocks of them is removed on the same tick. Above Y=127, on the bedrock roof, water stays, so it can be used for farming there.

The pack raises the max_block_modifications game rule to 200,000 so that the 41×41×41 clearing area is allowed.

History

0.5-alpha	Freezing water mechanic optimized. Frost Protection added; the release notes say level III grants immunity.
1.03	Freezing water effects nerfed: no more Blindness, and the Darkness and Slowness durations were shortened.
1.10	Freezing water nerfed: half a heart of damage instead of a full heart per tick. Water can no longer be placed inside Hell.

Since 1.12.2, the repository fixes spectators getting the freezing water effects; the in-development code excludes Spectator mode.

Trivia

• A commented-out version of the check would only have applied in open water under the sky, but it doesn't work because water lowers the sky light level.
• The 1.10 release notes explain the Hell rule: "Water can no longer be placed *inside* of Hell (Guys please I just want flowers in the nether stop being naughty)".
• The release notes say Frost Protection III grants immunity, but the code only checks that the chestplate has the enchantment at any level.

See also

• Frost Protection
• Weather