Hello, currently I don't see a way to configure turning grass blocks into dirt blocks when a tornado runs it over. This would be useful to have for mods that add custom dirt and grass blocks, or just turning blocks into something else.

For example, adding "regions_unexplored:sandy_grass_block" -> "regions_unexplored:sandy_dirt"
or "#minecraft:sapling" -> "minecraft:dead_bush" for tags
or maybe even "minecraft:wheat_crop[age=8]" -> "minecraft:wheat_crop[age=1]" for blockstates.

turn off block destruction