--パワー・ジャイアント
--Power Giant
local s,id=GetID()
function s.initial_effect(c)
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--decrease damage
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EVENT_ATTACK_ANNOUNCE)
	e2:SetOperation(s.damop)
	c:RegisterEffect(e2)
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e3:SetCode(EVENT_BE_BATTLE_TARGET)
	e3:SetOperation(s.damop)
	c:RegisterEffect(e3)
end
function s.spfilter(c)
	return c:IsLevelBelow(4) and c:IsAbleToGraveAsCost()
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=e:GetHandlerPlayer()
	local rg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_HAND,0,c)
	return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and #rg>0 and aux.SelectUnselectGroup(rg,e,tp,1,1,nil,0)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,c)
	local c=e:GetHandler()
	local g=nil
	local rg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_HAND,0,c)
	local g=aux.SelectUnselectGroup(rg,e,tp,1,1,nil,1,tp,HINTMSG_TOGRAVE,nil,nil,true)
	if #g>0 then
		g:KeepAlive()
		e:SetLabelObject(g)
		return true
	end
	return false
end
function s.spop(e,tp,eg,ep,ev,re,r,rp,c)
	local g=e:GetLabelObject()
	if not g then return end
	Duel.SendtoGrave(g,REASON_COST)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_LEVEL)
	e1:SetValue(-g:GetFirst():GetLevel())
	e1:SetReset(RESET_EVENT|(RESETS_STANDARD_DISABLE&~RESET_TOFIELD))
	e:GetHandler():RegisterEffect(e1)
	g:DeleteGroup()
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CHANGE_DAMAGE)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetTargetRange(1,0)
	e1:SetValue(s.damval)
	e1:SetReset(RESET_PHASE|PHASE_DAMAGE)
	Duel.RegisterEffect(e1,tp)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_NO_EFFECT_DAMAGE)
	e2:SetReset(RESET_PHASE|PHASE_DAMAGE)
	Duel.RegisterEffect(e2,tp)
end
function s.damval(e,re,val,r,rp,rc)
	if (r&REASON_EFFECT)~=0 then return 0
	else return val end
end