great_death_beam.lua

function onGetFormulaValues(player, level, maglevel)
	local min = (level / 5) + (maglevel * 5.5)
	local max = (level / 5) + (maglevel * 9)
	return -min, -max
end

local initCombat = Combat()
initCombat:setCallback(CALLBACK_PARAM_LEVELMAGICVALUE, "onGetFormulaValues")

local function createCombat(combat, area)
	combat:setParameter(COMBAT_PARAM_TYPE, COMBAT_DEATHDAMAGE)
	combat:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_MORTAREA)
	combat:setArea(createCombatArea(area))
	return combat
end

local combat1 = createCombat(initCombat, AREA_BEAM6)
local combat2 = createCombat(initCombat, AREA_BEAM7)
local combat3 = createCombat(initCombat, AREA_BEAM8)

local spell = Spell("instant")

local exhaust = {}
function spell.onCastSpell(creature, var)
	if not creature or not creature:isPlayer() then
		return false
	end

	local grade = creature:upgradeSpellsWOD("Great Death Beam")
	if grade == WHEEL_GRADE_NONE then
		creature:sendCancelMessage("You cannot cast this spell")
		creature:getPosition():sendMagicEffect(CONST_ME_POFF)
		return false
	end

	local cooldown = { 10, 8, 6 }
	var.runeName = "Beam Mastery"
	local executed = false

	local combat = { combat1, combat2, combat3 }

	executed = combat[grade]:execute(creature, var)

	if executed then
		local condition = Condition(CONDITION_SPELLCOOLDOWN, CONDITIONID_DEFAULT, 260)
		local executedCooldown = cooldown[grade]
		if executedCooldown ~= nil then
			condition:setTicks((executedCooldown * 1000))
		end
		creature:addCondition(condition)
		return true
	end
	return false
end

spell:group("attack")
spell:id(260)
spell:name("Great Death Beam")
spell:words("exevo max mort")
spell:level(300)
spell:mana(140)
spell:isPremium(false)
spell:needDirection(true)
spell:blockWalls(true)
spell:cooldown(1000) -- Cooldown is calculated on the casting
spell:groupCooldown(2 * 1000)
spell:needLearn(true)
spell:vocation("sorcerer;true", "master sorcerer;true")
spell:register()