-- Revanchion (Scourge Invasion Boss) made by Manmadedrummer for Araxia Online

local NPC_REVANCHION = 14690
local SPELL_FROST_NOVA = 14907
local SPELL_SHADOW_BOLT_VOLLEY = 15245

local function CastRandomSpell(eventId, delay, calls, creature)
    local target = creature:GetVictim()
    if target then
        local spellList = {SPELL_FROST_NOVA, SPELL_SHADOW_BOLT_VOLLEY}
        local spellToCast = spellList[math.random(1, #spellList)]
        creature:CastSpell(target, spellToCast, false)
    end
    creature:RegisterEvent(CastRandomSpell, 3000, 1)
end

local function OnCombat(event, creature, target)
    creature:RegisterEvent(CastRandomSpell, 3000, 1)
end

local function OnLeaveCombat(event, creature)
    creature:RemoveEvents()
end

local function OnDeath(event, creature, killer)
    creature:RemoveEvents()
end

RegisterCreatureEvent(NPC_REVANCHION, 1, OnCombat)
RegisterCreatureEvent(NPC_REVANCHION, 2, OnLeaveCombat)
RegisterCreatureEvent(NPC_REVANCHION, 4, OnDeath)