Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can only control 1 "Life Shaver". Once per turn, during your opponent's End Phase: Place 1 counter on this card. During the Main or Battle Phase, if this card has a counter(s) on it: You can send this card to the GY, then make your opponent discard as many cards as possible, up to the number of counters that were on this card.
--削りゆく命
--Life Shaver
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	c:SetUniqueOnField(1,0,id)
	c:EnableCounterPermit(0x208)
	--Activate
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_ACTIVATE)
	e0:SetCode(EVENT_FREE_CHAIN)
	e0:SetHintTiming(0,TIMING_END_PHASE)
	c:RegisterEffect(e0)
	--Add counter
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_COUNTER)
	e1:SetType(EFFECT_TYPE_TRIGGER_F+EFFECT_TYPE_FIELD)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetRange(LOCATION_SZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.ctcon)
	e1:SetOperation(s.ctop)
	c:RegisterEffect(e1)
	--Discard
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_TOGRAVE+CATEGORY_HANDES)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetCode(EVENT_FREE_CHAIN)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCondition(s.disccon)
	e2:SetTarget(s.disctg)
	e2:SetOperation(s.discop)
	c:RegisterEffect(e2)
end
s.listed_names={id}
s.counter_place_list={0x208}
function s.ctcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsTurnPlayer(1-tp)
end
function s.ctop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not (c:IsRelateToEffect(e) and c:IsCanAddCounter(0x208,1)) then return end
	c:AddCounter(0x208,1)
end
function s.disccon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetCounter(0x208)>0 and (Duel.IsMainPhase() or Duel.IsBattlePhase())
end
function s.disctg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:GetFlagEffect(id)==0 and c:IsAbleToGrave()
		and Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,0,LOCATION_HAND,1,nil,REASON_EFFECT) end
	c:RegisterFlagEffect(id,RESET_CHAIN,0,1)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,c,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_HANDES,nil,0,1-tp,c:GetCounter(0x208))
end
function s.discop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local ct=c:GetCounter(0x208)
	if not c:IsRelateToEffect(e) or ct==0 then return end
	if Duel.SendtoGrave(c,REASON_EFFECT)>0 and c:IsLocation(LOCATION_GRAVE)
		and Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,0,LOCATION_HAND,1,nil,REASON_EFFECT) then
		Duel.BreakEffect()
		Duel.Hint(HINT_SELECTMSG,1-tp,HINTMSG_DISCARD)
		Duel.DiscardHand(1-tp,Card.IsDiscardable,ct,ct,REASON_EFFECT,nil,REASON_EFFECT)
	end
end