Toxic Sky & Plastic Seas
Toxic Sky & Plastic Seas is a Minecraft mod made for Modfest 1.20 "Sky and Sea".
The mod turns rain into green acid that damages worn and dropped into the world items and generates plastic garbage patches in deep ocean biomes, which can be collected and recycled into plastic armor that is immune to the acid rain.
You can disable acid rain with convertRainToAcidRain game rule or configure which items or entities should not be damaged with #toxsky:immune_to_acid_rain item and entity tags.
