--Effect Rune - Singularity
local m=80828888
local cm=_G["c"..m]

function cm.initial_effect(c)
	aux.I_Am_Runic(c)
	aux.Normal_Runic_Attach(c)
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_XMATERIAL+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_CUSTOM+18080888)
	e3:SetCountLimit(1)
	e3:SetOperation(cm.desop)
	c:RegisterEffect(e3)
end

function cm.desop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local g=Duel.GetMatchingGroup(Card.IsFaceup,tp,0,LOCATION_MZONE,nil)
	local tc=g:GetFirst()
	while tc do
		local atk=tc:GetAttack()
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(-300)
		e1:SetReset(RESET_EVENT+RESETS_STANDARD)
		tc:RegisterEffect(e1)
		local e2=e1:Clone(e:GetHandler())
		e2:SetCode(EFFECT_UPDATE_DEFENSE)
		tc:RegisterEffect(e2)
	end
	c:RegisterFlagEffect(180808882,RESET_PHASE+PHASE_END,0,1)
end