this was made from scratch. if there is another command block blog i dont want to copy.
Tp commands
/tp @a (x coordinate) (y coordinate) (z coordinate)
/tp @p (x coordinate) (y corrdinate) (z coordinate)
/tp @r (x coordinate) (y coordinate) (z coordinate)

potion effect
/effect @ (a,p, or r) (effect id) (power level) (time)

Give commands
/give @ (a,p, or r) (item id) (ammount) Speaking /say @a (message)

Setting spawn
/setspawn @

weather control
/toggledownfall

gamemode
/gamemode (@a,p, or r) (0,1, or 2)

Scoreboardscoreboard <objectives|players|teams>The base command of the scoreboard system.N/A

scoreboard objectives listLists all existing objectives, with their display name and criteria.Always succeeds.

scoreboard objectives add <name> <criteria> [display name...]Creates a new objective with the internal name name, specified criteria, and the optional display name. Without a specified display name, it will default to name. See above section for the meaning of these properties. All arguments are case-sensitive.name must not be used by an existing objective, and must be at most 16 characters. criteria must be a valid criteria type. display name must be at most 32 characters, else the objective will be created with a displayname identical to name and the command will seem to fail.

scoreboard objectives remove <name>Deletes all references to the objective with name in the scoreboard system. Data is deleted from the objectives list, player scores, and if it was on a display list, it will no longer be displayed.name must be an existing objective.

scoreboard objectives setdisplay <slot> [objective]Displays score info for objective in the specified slot. Valid slots are "list", "sidebar" and "belowName". "list" will display score information in the player list (default Tab key), in yellow text to the right of each player's name, and will not display the objective name. "sidebar" will display score information on the right side of the screen at all times, and will display the objective's display name at the top of the list. Even players who are not online, but have a score in this objective, will be displayed in "sidebar". "belowName" will display score below the nametag above the player (only visible in multiplayer). Note that the objective parameter is optional: if no objective is provided, this display slot is cleared (returned to its default state).objective must exist, if it is specified. slot must also exist. Note that clearing an empty slot will still succeed.

scoreboard players list [playername]Displays all players who are tracked, in some way, by the scoreboard system. The optional playername parameter can be used to display all scores of a particular player.playername must have recorded scores, if specified.

scoreboard players set <player> <objective> <score>Sets the player's score in objective to score, overwriting the previous score if it exists.objective must exist, and score must be between -2,147,483,648 and 2,147,483,647, inclusive. Note that player does not need to be online or even exist.

scoreboard players add <player> <objective> <count>Increments the player's score in objective by count.objective must exist, and count must be between 1 and 2,147,483,647, inclusive. Note that player does not need to be online or even exist.

scoreboard players remove <player> <objective> <count>Decrements the player's score in objective by count.

scoreboard players reset <player>Deletes all scores for player. Note that this applies to all objectives, and does not merely set them to 0: it removes the player from the scoreboard altogether.Always succeeds, even on players who are not on the scoreboard.

scoreboard teams list [teamname]Lists all teams, with their display names and the amount of players in them. The optional teamname parameter can be used to display all players on a particular team.If teamname is specified, it must exist and must have players.

scoreboard teams add <name> [display name...]Creates a team with the given name and optional display name.name must not be used by an existing team, and must be at most 16 characters. display name must be at most 32 characters, else the team will be created with a displayname identical to name and the command will seem to fail.

scoreboard teams remove <name>Deletes the named team from the scoreboard system.name must be an existing team.

scoreboard teams empty <name>Removes all players from the named team. The help text says that the subcommand is "clear", not "empty"; bug?name must be an existing team, and the team must have at least one player.

scoreboard teams join <team> [players...]Assigns the specified players to the specified team. If no player is specified the player running the command joins the team.team must exist. Note that the named players do not need to be online or even exist, and can even already be on the team.

scoreboard teams leave [players...]Makes the specified players leave their teams. If no player is specified the player running the command leaves their team.Each player must be on a team - it is possible to get a partial success and partial failure, but a command block will report only the failure.

scoreboard teams option <team> <color|friendlyfire|seeFriendlyInvisibles> <value>The base command for team-specific settings.

scoreboard teams option <team> color <value>Will color the name of all players on this team in chat, above their head, on the Tab menu, and on the sidebar. Valid color values are "black", "dark_blue", "dark_green", "dark_aqua", "dark_red", "dark_purple", "gold", "gray", "dark_gray", "blue", "green", "aqua", "red", "light_purple", "yellow", and "white". Other valid values are "reset" (names show in default color and formatting), "obfuscated" (same as effect seen in obfuscated parts of the End Poem), "bold", "strikethrough", "underline", and "italic". See Formatting Codes for information about how these will appear.team must exist, and value must be a valid value.

scoreboard teams option <team> friendlyfire <true|false>The default setting, true, has no impact on PvP mechanics. When set to false, players on this team cannot harm each other with melee, bow, or Splash Potion of Harming attacks, but may still inflict negative status effects on each other.team must exist, and the setting must be "true" or "false".
scoreboard teams option <team> seeFriendlyInvisibles <true|false>When set to true, players on this team will see invisible teammates (and themselves) as semi-transparent instead of completely invisible.team must exist, and the setting must be "true" or "false".

comming soon

Here are some commands coming soon: Mobgrief toggler