Mist
If this face-up card on the field returns to the hand: Special Summon it, but it cannot attack this turn.
local s, id, o = GetID()
function s.initial_effect(c)
	--spsummon
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_F)
	e1:SetCode(EVENT_TO_HAND)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
function s.spcon(e, tp, eg, ep, ev, re, r, rp)
	return e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD) and e:GetHandler():IsPreviousPosition(POS_FACEUP)
end
function s.sptg(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return true
	end
	Duel.SetOperationInfo(0, CATEGORY_SPECIAL_SUMMON, e:GetHandler(), 1, 0, 0)
end
function s.spop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	if not c:IsRelateToEffect(e) then
		return
	end
	if Duel.GetLocationCount(tp, LOCATION_MZONE) <= 0 then
		Duel.SendtoGrave(c, REASON_EFFECT)
		return
	end
	if Duel.SpecialSummon(c, 0, tp, tp, false, false, POS_FACEUP) ~= 0 then
		local e1 = Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_CANNOT_ATTACK)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetReset(RESET_EVENT + RESETS_STANDARD + RESET_PHASE + PHASE_END)
		c:RegisterEffect(e1)
	end
end


Mist
If this face-up card on the field returns to the hand: Special Summon it, but it cannot attack this turn.
-- Mist
local s, id, o = GetID()
function s.initial_effect(c)
	--spsummon
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_F)
	e1:SetCode(EVENT_TO_HAND)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
function s.spcon(e, tp, eg, ep, ev, re, r, rp)
	return e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD) and e:GetHandler():IsPreviousPosition(POS_FACEUP)
end
function s.sptg(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return true
	end
	Duel.SetOperationInfo(0, CATEGORY_SPECIAL_SUMMON, e:GetHandler(), 1, 0, 0)
end
function s.spop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	if not c:IsRelateToEffect(e) then
		return
	end
	if Duel.GetLocationCount(tp, LOCATION_MZONE) <= 0 then
		Duel.SendtoGrave(c, REASON_EFFECT)
		return
	end
	if Duel.SpecialSummon(c, 0, tp, tp, false, false, POS_FACEUP) ~= 0 then
		local e1 = Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_CANNOT_ATTACK)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetReset(RESET_EVENT + RESETS_STANDARD + RESET_PHASE + PHASE_END)
		c:RegisterEffect(e1)
	end
end

