1)可以节省一下...
execute @e[tag=B] ~ ~ ~ entitydata @e[tag=A,r=3] {CustomPotionEffects:...}
1.13的话理论上这样，免去标签步骤execute as @e[type=skeleton,nbt={自定义名字标签}] at @s run data merge entity @e[type=arrow,distance=..3,nbt={pickup:0b} {CustomPotionEffects:...}
execute @e[tag=B] ~ ~ ~ entitydata @e[tag=A,r=3] {CustomPotionEffects:...}
1.13的话理论上这样，免去标签步骤execute as @e[type=skeleton,nbt={自定义名字标签}] at @s run data merge entity @e[type=arrow,distance=..3,nbt={pickup:0b} {CustomPotionEffects:...}
物品是minecraft:splash_potion
实体是minecraft:potion
实体是minecraft:potion