--Grenosaurus the Survivor
local s,id=GetID()
function s.initial_effect(c)
	aux.AddOrigTimeleapType(c,false)
	aux.AddTimeleapProc(c,4,s.sumcon,s.tlfilter)
	c:EnableReviveLimit()
	--At the start of the Damage Step, if this card attacks an opponent's monster: You can destroy that opponent's monster, and if you do, inflict 1000 damage to your opponent.
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_BATTLE_START)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--If this card on the field is destroyed by battle or card effect: You can target 1 card on the field; destroy it.
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_DESTROYED)
	e2:SetCountLimit(1,{id,0})
	e2:SetCondition(s.descon2)
	e2:SetTarget(s.destg2)
	e2:SetOperation(s.desop2)
	c:RegisterEffect(e2)
end
function s.sumcon(e,c)
	return Duel.GetFieldGroupCount(c:GetControler(),LOCATION_MZONE,0,nil)<Duel.GetFieldGroupCount(c:GetControler(),0,LOCATION_MZONE,nil)
end
function s.tlfilter(c,e,mg)
	local ef=e:GetHandler():GetFuture()
	return c:IsLevelBelow(ef-1) and not c:IsType(TYPE_TOKEN)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	local d=Duel.GetAttackTarget()
	if chk ==0 then return Duel.GetAttacker()==e:GetHandler() and d end
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,d,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,1000)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local d=Duel.GetAttackTarget()
	if d:IsRelateToBattle() then
		if Duel.Destroy(d,REASON_EFFECT)>0 then
			Duel.Damage(1-tp,1000,REASON_EFFECT)
		end
	end
end
function s.descon2(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD) and (r&REASON_EFFECT+REASON_BATTLE)~=0
end
function s.destg2(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsOnField() end
	if chk==0 then return Duel.IsExistingTarget(aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.desop2(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.Destroy(tc,REASON_EFFECT)
	end
end