Hack
If your opponent controls no monsters, you can Special Summon this card (from your hand).
local s, id, o = GetID()
function s.initial_effect(c)
	--special summon
	local e1 = Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.hspcon)
	c:RegisterEffect(e1)
end
function s.hspcon(e, c)
	if c == nil then
		return true
	end
	return Duel.GetFieldGroupCount(c:GetControler(), 0, LOCATION_MZONE) == 0 and Duel.GetLocationCount(c:GetControler(), LOCATION_MZONE) > 0
end


Hack
If your opponent controls no monsters, you can Special Summon this card (from your hand).
-- Hack
local s, id, o = GetID()
function s.initial_effect(c)
	--special summon
	local e1 = Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.hspcon)
	c:RegisterEffect(e1)
end
function s.hspcon(e, c)
	if c == nil then
		return true
	end
	return Duel.GetFieldGroupCount(c:GetControler(), 0, LOCATION_MZONE) == 0 and Duel.GetLocationCount(c:GetControler(), LOCATION_MZONE) > 0
end

