Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If your opponent controls a monster, you can Tribute Summon this card face-up with 1 Tribute. If this card attacks a Defense Position monster, inflict piercing battle damage.
--E－HERO マリシャス・エッジ
--Evil HERO Malicious Edge
local s,id=GetID()
function s.initial_effect(c)
	--summon with 1 tribute
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_SUMMON_PROC)
	e1:SetCondition(s.otcon)
	e1:SetOperation(s.otop)
	e1:SetValue(SUMMON_TYPE_TRIBUTE)
	c:RegisterEffect(e1)
	--pierce
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_PIERCE)
	c:RegisterEffect(e2)
end
function s.otcon(e,c,minc)
	if c==nil then return true end
	return Duel.GetFieldGroupCount(c:GetControler(),0,LOCATION_MZONE)>0
		and c:GetLevel()>6 and minc<=1 and Duel.CheckTribute(c,1)
end
function s.otop(e,tp,eg,ep,ev,re,r,rp,c)
	local sg=Duel.SelectTribute(tp,c,1,1)
	c:SetMaterial(sg)
	Duel.Release(sg,REASON_SUMMON|REASON_MATERIAL)
end