TalkAction [Command] /kill ...

local config = {
--[[
	Fun Script Kill v1.0
	by Maxi (Shawak)
]]--	
	-- CONFIG --------------------------------------------------

	timeToDie = 5     -- after this seconds, the player die

	-- CONFIG END ----------------------------------------------

}	-- Don't touch ----------------
	local z = config.timeToDie
	local events = {} 
	local fight = createConditionObject(CONDITION_INFIGHT, (config.timeToDie*1000+100))
	-------------------------------

function onSay(cid, words, param, channel)
	local player = getPlayerByNameWildcard(param)
	local message = ""..getCreatureName(cid).." decided to kill you in ..."

	if (player ~= nil) and (isPlayer(cid) == TRUE) then
		if getPlayerGroupId(player) == 1 then
			doAddCondition(player, fight)
			events = addEvent(text,100,{cid = cid, player = player})
			doPlayerSendTextMessage(player,18,message)
		else
			doPlayerSendTextMessage(cid,18,"You can only kill players.")
		end
	else
		doPlayerSendTextMessage(cid,18,"Player not found.")
	end
	return TRUE
end

function text(parameters)
	local cid = parameters.cid
	local player = parameters.player

	if (getPlayerLevel(player) ~= FALSE) then
		if z >= 1 then
			doPlayerSendTextMessage(player,18,""..z.."")
			events = addEvent(text,1000,{cid = cid, player = player})
			z = z-1
		elseif z == 0 then
			z = config.timeToDie
			events = nil
			doCreatureAddHealth(player,-getCreatureHealth(player))
			doPlayerSendTextMessage(cid,18,"You killed "..getCreatureName(player)..".")
		end
	end
	return TRUE
end

<talkaction words="/kill" event="script" value="kill.lua"/>

timeToDie = 5