Minecraft Command: The Complete Strategy Guide – Trick #25: “Use ‘unless blocks’ to Precisely Detect Snowball Collisions!”

“Use ‘unless blocks’ to Precisely Detect Snowball Collisions!”

Command entered in the Command Block:

Command Block A

Block Type: Repeat / Redstone: Always Active

/execute as @e[type=snowball] at @s unless blocks ~1~1~1 ~-1~-1~-1 ~~~ masked run tag @s add back
This adds the back tag to the snowball when it’s about to hit a wall or the ground.

Command Block B

Block Type: Repeat / Redstone: Always Active

/execute as @e[tag=back] at @s run tp @s ^^0.1^1 facing @p
This gives entities with the back tag (the thrown snowball) a movement that makes them fly back towards the player.