fix Tribute Burial (#479)

c80230510.lua

@@ -4,9 +4,13 @@ function c80230510.initial_effect(c)
 	local e1=Effect.CreateEffect(c)
 	e1:SetType(EFFECT_TYPE_ACTIVATE)
 	e1:SetCode(EVENT_FREE_CHAIN)
+	e1:SetTarget(c80230510.target)
 	e1:SetOperation(c80230510.activate)
 	c:RegisterEffect(e1)
 end
+function c80230510.target(e,tp,eg,ep,ev,re,r,rp,chk)
+	if chk==0 then return Duel.GetFlagEffect(tp,80230510)==0 end
+end
 function c80230510.activate(e,tp,eg,ep,ev,re,r,rp)
 	local c=e:GetHandler()
 	local e1=Effect.CreateEffect(c)
@@ -24,6 +28,7 @@ function c80230510.activate(e,tp,eg,ep,ev,re,r,rp)
 	local e2=e1:Clone()
 	e2:SetCode(EFFECT_SET_PROC)
 	Duel.RegisterEffect(e2,tp)
+	Duel.RegisterFlagEffect(tp,80230510,RESET_PHASE+PHASE_END,0,1)
 	local e3=Effect.CreateEffect(c)
 	e3:SetType(EFFECT_TYPE_FIELD)
 	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
@@ -53,4 +58,5 @@ function c80230510.otop(e,tp,eg,ep,ev,re,r,rp,c)
 	local g2=Duel.SelectMatchingCard(tp,c80230510.rmfilter,tp,0,LOCATION_GRAVE,1,1,nil)
 	g1:Merge(g2)
 	Duel.Remove(g1,POS_FACEUP,REASON_COST)
+	Duel.ResetFlagEffect(tp,80230510)
 end