fix Chaosrider Gustaph (#1730)

* fix

* fix

c47829960.lua

@@ -4,7 +4,6 @@ function c47829960.initial_effect(c)
 	local e1=Effect.CreateEffect(c)
 	e1:SetDescription(aux.Stringid(47829960,0))
 	e1:SetCategory(CATEGORY_ATKCHANGE)
-	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
 	e1:SetType(EFFECT_TYPE_IGNITION)
 	e1:SetRange(LOCATION_MZONE)
 	e1:SetCountLimit(1)
@@ -15,15 +14,14 @@ end
 function c47829960.filter(c)
 	return c:IsType(TYPE_SPELL) and c:IsAbleToRemove()
 end
-function c47829960.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
-	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and c47829960.filter(chkc) end
-	if chk==0 then return Duel.IsExistingTarget(c47829960.filter,tp,LOCATION_GRAVE,0,1,nil) end
-	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
-	local g=Duel.SelectTarget(tp,c47829960.filter,tp,LOCATION_GRAVE,0,1,2,nil)
-	Duel.SetOperationInfo(0,CATEGORY_REMOVE,g,g:GetCount(),tp,LOCATION_GRAVE)
+function c47829960.target(e,tp,eg,ep,ev,re,r,rp,chk)
+	if chk==0 then return Duel.IsExistingMatchingCard(c47829960.filter,tp,LOCATION_GRAVE,0,1,nil) end
+	Duel.SetOperationInfo(0,CATEGORY_REMOVE,nil,1,tp,LOCATION_GRAVE)
 end
 function c47829960.operation(e,tp,eg,ep,ev,re,r,rp)
-	local g=Duel.GetChainInfo(0,CHAININFO_TARGET_CARDS):Filter(Card.IsRelateToEffect,nil,e)
+	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
+	local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(c47829960.filter),tp,LOCATION_GRAVE,0,1,2,nil)
+	if #g>0 then
 		local count=Duel.Remove(g,POS_FACEUP,REASON_EFFECT)
 		local c=e:GetHandler()
 		if count>0 and c:IsFaceup() and c:IsRelateToEffect(e) then
@@ -34,4 +32,5 @@ function c47829960.operation(e,tp,eg,ep,ev,re,r,rp)
 			e1:SetReset(RESET_EVENT+RESETS_STANDARD+RESET_DISABLE+RESET_PHASE+PHASE_END,2)
 			c:RegisterEffect(e1)
 		end
+	end
 end