Uploaded July 2022 | Updated September 2026, 5 days ago

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Questions about this episode or want help on your own Minecraft creations? Join the Command Block Cove on Discord: discord.gg/Vr9vfP6EqH

This week, we're adding a custom Double Jump enchantment for Elytra!

Trying something a bit different this week. Be on the look out for the regular, in depth explanation of the commands in a few days. In the meantime, here's a shorter, snappier overview of the creation.

Here are the commands used in this creation:
Command 1- Modify Elytra:
execute as @e[type=minecraft:item,nbt={Item:{tag:{BlockEntityTag:{Items:[{Slot:4b,id:"minecraft:lapis_lazuli",Count:3b},{Slot:12b,tag:{Potion:"minecraft:leaping"},Count:1b},{Slot:13b,id:"minecraft:elytra",Count:1b},{Slot:14b,tag:{Potion:"minecraft:leaping"},Count:1b},{Slot:22b,id:"minecraft:experience_bottle",Count:48b}]}}}},nbt=!{Item:{tag:{BlockEntityTag:{Items:[{Slot:13b,tag:{DoubleJump:1b}}]}}}}] at @s if block ~ ~ ~ minecraft:enchanting_table store success entity @s Item.tag.BlockEntityTag.Items[{Slot:13b}].tag.DoubleJump byte 1 run data modify entity @s Item.tag.BlockEntityTag.Items[{Slot:13b}].tag.display.Lore append value '{"text":"Double Jump","italic":"false","color":"gray"}'

Command 2 - Replace Shulker Chest with Elytra:
execute as @e[type=minecraft:item,nbt={Item:{tag:{BlockEntityTag:{Items:[{Slot:4b,id:"minecraft:lapis_lazuli",Count:3b},{Slot:12b,tag:{Potion:"minecraft:leaping"},Count:1b},{Slot:13b,id:"minecraft:elytra",Count:1b},{Slot:14b,tag:{Potion:"minecraft:leaping"},Count:1b},{Slot:22b,id:"minecraft:experience_bottle",Count:48b}]}}}}] at @s if block ~ ~ ~ minecraft:enchanting_table store result entity @s Item.tag.Enchantments[{id:"fbf:double_jump"}].lvl short 1 run data modify entity @s Item set from entity @s Item.tag.BlockEntityTag.Items[{Slot:13b}]

Command 3 - Create Scoreboard:
scoreboard objectives add double_jump_tracker minecraft.custom:minecraft.jump

Command 4 - Add Levitation:
execute as @a[nbt={Inventory:[{Slot:102b,id:"minecraft:elytra",tag:{DoubleJump:1b}}],FallFlying:1b},scores={double_jump_tracker=2..}] store result score @s double_jump_tracker run effect give @s minecraft:levitation 1 16 true

Command 5 - Remove Levitation:
effect clear @a[nbt={ActiveEffects:[{Id:25,Duration:16,Amplifier:16b}]}] minecraft:levitation

Chapters:
0:00 - Introduction
1:19 - Demo
2:40 - Command Overview
4:30 - Outro