New blocks:

• Rubble in stone and deepslate forms
• Iron scrap metal
• Ivy, somewhat akin to vines that grow upwards instead of downwards
• Cracked concrete in all colours
• Leaf piles for all extent tree types
• Rotten melons and pumpkins
• Ragged banners, which can display any pattern supported by vanilla banners

New item: De/Activator, which can be used on many blocks to shut off their custom behaviours. Useful for making inert aesthetics.

New decay conditions:

• is_solid_block for checking generic properties of blocks
• in_biome, current_weather, is_humid, and temperature, fairly self-explanatory
• position, dimension, altitude, depth, and light, also self-explanatory
• near_to is similar to adjacent_to but can search a region around the block instead of just its immediate neighbours
• macro allows the use of a Decay Macro as a reusable condition without retyping it each time

Decay functions:

• randomise_blockstate_value can now accept a list of valid options per-value, such as to prevent slabs from becoming double slabs instead of just top or bottom slabs