[Welcome with a join counter]

variables:
	{joins.global} = 0



on first join:
	add 1 to {joins.global}
	broadcast "&3&lWELCOME &b%player%&f has joined for the first time! &8(&7##%{joins.global}%&8)"
on join:
	broadcast "&8[&a+&8] &b%player%&f has joined."
on quit:
	broadcast "&8[&c-&8] &b%player%&f has quit."  

 

[Request on Skript]

on load:
	set {item} to stick named "Waypoint"

on right click holding {item}:
	set {waypoint} to player's location		# (if this doesnt work, you could replace location with coordinates)
	wait 1 second

	teleport player to {waypoint}
	loop players within 5 meters of the player:
		teleport loop-player to {waypoint}

I would suggest adding a cooldown to the feature, since it could be spammed like in milliseconds.

 

With cooldown:

on load:
	set {item} to stick named "Waypoint"
	set {cooldown.%player%} to false

on right click holding {item}:
	if {cooldown.%player%} is true:
		send "You are on cooldown!" to player
		stop

	if {cooldown.%player%} is false:
		set {cooldown.%player%} to true
		set {waypoint} to player's location		# (if this doesnt work, you could replace location with coordinates)
		wait 1 second

		teleport player to {waypoint}
		loop players within 5 meters of the player:
			teleport loop-player to {waypoint}
		set {cooldown.%player%} to false
		stop

^ You could also add that on join the player's cooldown is reset, in the case they leave the server while on cooldown. (I think that affects it, but im noit sure)

[i need help adding a cooldown to my skript]

on load:
	set {cooldown.%player%} to false

on right click on entity holding amethyst shard:
	if {cooldown.%player%} is true:
		send "You are on cooldown!" to player
		stop
	if {cooldown.%player%} is false:
		send "&4Lift power used!" to player
		push entity up at speed 2.5
		push entity in direction of player at speed 1
		wait 1 second
		push entity down at speed 2.5
# COOLDOWN #
		set {cooldown.%player%} to true
		wait 2 seconds
		set {cooldown.%player%} to false

This could be one way. With this your cooldown is 2 seconds, and every player gets their cooldown reset every time the skript is reloaded or the server is restarted too. (you might wanna make it on join if you are worried about them leaving before the cooldown is out)

[I need help]

on load:
	set {hammer} to iron axe named "&6Jail Hammer"
	set {jail} to location 63, 105, 29 in world "world"

on attack:
	if victim is a player:
		if attacker is a player:
			if attacker is holding {hammer}:
				teleport victim to {jail}
				stop

This is how I'd do it. Note that most Skript I know is 1.18.2

On load: when the skript is loaded (server startup, skript reload)
On attack: when anentity attacks another entity