Minecraft raids.dat format
From Just Solve the File Format Problem
The Minecraft raids.dat format is used in the Java Edition of the Minecraft game. This and other Minecraft formats are extensively documented in the Minecraft Gamepedia wiki.
The format stores information about raids in a level of Minecraft. aids_nether.dat and raids_end.dat are used for raid info regarding other dimensions. The Minecraft NBT format is used.
