execute if entity @s[gamemode=!creative,nbt={Inventory:[{Slot:-106b,id:"minecraft:brush"}]},nbt=!{SelectedItem:{id:"minecraft:brush"}}] run function manic:block/suspicious_soul_sand/durability/offhand
execute if entity @s[gamemode=!creative,nbt={SelectedItem:{id:"minecraft:brush"}}] run function manic:block/suspicious_soul_sand/durability/mainhand
