Players

Full health (and no longer burning) / a full hunger bar

heal player
feed player

Health in half hearts; 20 is ten hearts. Setting it to 0 kills

if health of player < 6:
    send "&cYou are badly hurt!"

The most health they can have

set max health of player to 40

Hunger, 0 to 20

set food of player to 20

Experience level

add 5 to level of player

survival, creative, adventure or spectator

set gamemode of player to creative

Whether they may fly: true or false

set flight of player to true

Give a potion effect; level 1 and 30 seconds unless said otherwise

apply speed 2 to player for 30 seconds

Take every effect away, or one

clear effects of player
clear speed effect of player

Set on fire (5 seconds unless said otherwise), or put out

ignite arg.1 for 3 seconds
extinguish player

Hold a player in place; they can still look around

freeze arg.1
send "&cYou have been frozen." to arg.1

Bring a dead player back at once, skipping the death screen

on player death:
    wait 1 tick
    respawn player

Open a book on their screen; nothing is put in their inventory

show player a book titled "Rules" with pages "&lRules\n\n1. Be kind.", "2. No griefing."

Take a player off the list another player sees when they hold Tab. They are still seen in the world; only the list changes. Needs a Paper server, 1.20 or newer

hide player from tab list of arg.1

Put them back on it. show <who> from tab list of <who> means the same

show player in tab list of arg.1

Turn them left or right: the same as set yaw of <who> to. 0 is south, 90 west, 180 north, -90 east

set player's yaw to -90

Make them look up or down: the same as set pitch of <who> to. -90 is straight up, 90 straight down

set player's pitch to 0

Make one player invisible to another, or visible again

hide player from arg.1
send "&7%arg.1% can no longer see you."

Remove a title from the screen

clear title of player

Their name in the tab list; settable

set tab name of player to "&6[VIP] &f%player.name%"

How many of their inventory slots are empty

if free slots of player < 3:
    send "&eYour inventory is nearly full."

Their connection delay in milliseconds. Unset on servers older than 1.17, where %player.ping% still works

send "&7Ping of %arg.1%: &f" + ping of arg.1

The pop-up in the top corner that advancements use. as task (the default), as goal or as challenge picks the frame and sound

send toast "&aQuest complete!" with icon diamond as challenge to player

A player head wearing that player's skin

on player kill:
    give head of victim to player

Grey out an item so it cannot be used for a while, as ender pearls are. item cooldown of <item> for <who> reads what is left

on right click:
    if event.item is "blaze_rod":
        if item cooldown of blaze rod for player > 0 seconds:
            stop
        set item cooldown of blaze rod for player to 5 seconds
        strike lightning at target block of player

Cut a sound short. stop all sounds needs Minecraft 1.17 or newer

stop sound "music_disc.cat" for player

Where another player is, as a location; for the player of the trigger, player's location

if distance between player's location and location of arg.1 > 10:
    send "&c%arg.1% is too far away."

Which way to turn at the first place to face the second, as the game counts it: 0 is south, 90 west

set {_way} to yaw from player's location to {spawn}
set player's yaw to {_way}

How far to look up or down: below nothing is up

set {_tilt} to pitch from player's location to {spawn}
set player's pitch to {_tilt}

The place that far along the way from one to the other; never beyond it

set {_step} to player's location moved 3 blocks towards {spawn}
teleport player to {_step}

The same, written after the player: loop-player's location, arg.1's location, {_name}'s location

loop all players:
    draw particle circle with radius 2 using particle "flame" at loop-player's location

Their golden extra hearts, in half hearts; settable

set absorption of player to 8

The number of the game version their client speaks, e.g. 754 for 1.16.5. Asked from ViaVersion if it is installed, otherwise from Paper; unset on plain Spigot

if protocol version of player < 765:
    send "&eYou are on an old version; some things may look different."

What their game calls itself: vanilla, fabric, forge. Paper only

log "%player.name% plays with " + client brand of player

Ask a question and wait for the answer. The next thing the player says in chat is the answer and nobody else sees it. Add for at most 30 seconds to change how long to wait (a minute by default); with no answer the variable is unset

command /clan <action>:
    trigger:
        ask player "&eWhat should your clan be called?" into {_name} for at most 30 seconds
        if {_name} is not set:
            send "&cToo slow."
            stop
        send "&aClan %{_name}% created."

The same, for an amount: an answer that is no number is said to be none and the question asked again. 1.5k counts

command /deposit:
    trigger:
        ask player "&eHow much?" as number into {_amount}
        if {_amount} is set:
            add {_amount} to {%player%.bank}

The same, with answers to click on. Typing one in chat works too

ask player "&ePick a team:" with options "Red", "Blue" into {_team}
if {_team} is set:
    add player to team lowercase {_team}

The question opens as an anvil with a box to type in; what the player types and takes out is the answer. Good inside menus, where chat is out of the way. The question stands on top of the window and the box starts empty, so the answer is simply typed; on an older server, where the question has to stand in the box, it is taken off the answer if it was left there. Needs a Paper server; elsewhere the question is asked in chat. Closing the anvil gives an empty answer

command /pet:
    players only: true
    trigger:
        ask player "Name your pet" with anvil into {_name}
        if {_name} is "":
            send "&7Maybe later."
            stop
        set {%player%.pet} to {_name}
        send "&aYour pet is called %{_name}%."

Ask yes or no; the block runs only if the player answers yes. confirm <text> for <who>: asks someone else

command /delhome:
    trigger:
        confirm "&cDelete your home? This cannot be undone.":
            delete {%player%.home}
            send "&eHome deleted."

A list of the items in their ender chest

send "&7Your ender chest holds " + size of (items in ender chest of player) + " stack(s)."

A list of the items they carry, without the armour and the other hand

command /carrying:
    trigger:
        loop items in inventory of player:
            send "&7%loop-index%. &f%loop-value%"
        else:
            send "&7You carry nothing."

Put items in an ender chest, or empty it

add 3 diamond to ender chest of player
send "&bA gift is waiting in your ender chest."

Send a chat message, or run a command if it starts with /, as that player

make player say "I love this server!"

Show a crafting grid or their ender chest

open workbench for player

From -1 to 1; the usual values are 0.1 for flying and 0.2 for walking

set walk speed of player to 0.4

How many uses the thing in their hand has left; unset for what does not wear out. set tool durability of player to 50 sets it

set {_left} to tool durability of player
if {_left} is set and {_left} < 20:
    send "&cYour tool is about to break."

The time of day that player sees, standing still, whatever the world's clock says: 1000 day, 6000 noon, 13000 night, 18000 midnight. Nobody else sees it. reset time of <who> gives them the world's own again

command /midnight:
    trigger:
        set time of player to 18000

command /daylight:
    trigger:
        reset time of player

The weather that player sees: rain or clear. reset weather of <who> gives them the world's own again

set weather of player to rain
wait 30 seconds
reset weather of player

Hidden hunger reserve; seconds of breath left (15 is full)

if air of player < 3:
    send "&cYou are running out of breath!"

The selected hotbar slot, 1 to 9

set held slot of player to 1

Where their compass points

set compass target of player to {spawn}

Where they respawn; unset without a bed. Change it with set bed spawn of <who> to <location>

command /bed:
    players only: true
    trigger:
        if bed location of player is not set:
            send "&7You have not slept in a bed yet."
            stop
        teleport player to bed location of player

Which way they face; direction is north, east, south or west

send "&7You are facing &f" + direction of player

What their game calls its version, e.g. 1.21.4, for servers that let several versions in. From the number in protocol version of; one the list does not know yet comes as protocol <n>

on player join:
    if game version of player is not "1.21.4":
        send "&eYou are on %game version of player%. Some things look best on 1.21.4."

Their address and game language, e.g. en_us

log "%player.name% uses the language " + locale of player

Total time on the server, as a duration

send "&7Played: &f" + time played of player

How far they have fallen so far

if fall distance of player > 20:
    send "&cBrace yourself!"

Hide a player from everyone else, or show them again

vanish player
send "&7Nobody can see you now."

They have that potion effect

if player has effect speed:
    send "&bYou are fast."

As it says; is not works too

if arg.1 is frozen:
    send "&7%arg.1% is frozen."

Coming down through the air, or flying with an elytra

if player is falling:
    send action bar "&7Mind the landing." to player