Shurit,
If you Ritual Summon exactly 1 "Nekroz" Ritual Monster with a card effect that requires use of monsters, this card can be used as the entire requirement. If this card is Tributed by a card effect: You can add 1 Warrior "Nekroz" Ritual Monster from your Deck to your hand. You can only use this effect of "Shurit, Strategist of the Nekroz" once per turn.
local SETCARD_ID_0 = 0xb4 --Nekroz

local SETCARD_ID_0 = 0xb4 --Nekroz
local s, id, o = GetID()
function s.initial_effect(c)
	--ritual level
	local e1 = Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_RITUAL_LEVEL)
	e1:SetValue(s.rlevel)
	c:RegisterEffect(e1)
	--tohand
	local e2 = Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id, 0))
	e2:SetCategory(CATEGORY_TOHAND + CATEGORY_SEARCH)
	e2:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_RELEASE)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP + EFFECT_FLAG_DELAY)
	e2:SetCountLimit(1, id)
	e2:SetCondition(s.thcon)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
end
function s.rlevel(e, c)
	local lv = aux.GetCappedLevel(e:GetHandler())
	if c:IsSetCard(SETCARD_ID_0) then
		local clv = c:GetLevel()
		return (lv << 16) + clv
	else
		return lv
	end
end
function s.thcon(e, tp, eg, ep, ev, re, r, rp)
	return bit.band(r, REASON_EFFECT) ~= 0
end
function s.filter(c)
	return c:IsSetCard(SETCARD_ID_0) and c:IsType(TYPE_RITUAL) and c:IsRace(RACE_WARRIOR) and c:IsAbleToHand()
end
function s.thtg(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsExistingMatchingCard(s.filter, tp, LOCATION_DECK, 0, 1, nil)
	end
	Duel.SetOperationInfo(0, CATEGORY_TOHAND, nil, 1, tp, LOCATION_DECK)
end
function s.thop(e, tp, eg, ep, ev, re, r, rp)
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_ATOHAND)
	local g = Duel.SelectMatchingCard(tp, s.filter, tp, LOCATION_DECK, 0, 1, 1, nil)
	if g:GetCount() > 0 then
		Duel.SendtoHand(g, nil, REASON_EFFECT)
		Duel.ConfirmCards(1 - tp, g)
	end
end


Shurit,
If you Ritual Summon exactly 1 "Nekroz" Ritual Monster with a card effect that requires use of monsters, this card can be used as the entire requirement. If this card is Tributed by a card effect: You can add 1 Warrior "Nekroz" Ritual Monster from your Deck to your hand. You can only use this effect of "Shurit, Strategist of the Nekroz" once per turn.
-- Shurit,
local SETCARD_ID_0 = 0xb4 --Nekroz
local s, id, o = GetID()
function s.initial_effect(c)
	--ritual level
	local e1 = Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_RITUAL_LEVEL)
	e1:SetValue(s.rlevel)
	c:RegisterEffect(e1)
	--tohand
	local e2 = Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id, 0))
	e2:SetCategory(CATEGORY_TOHAND + CATEGORY_SEARCH)
	e2:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_RELEASE)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP + EFFECT_FLAG_DELAY)
	e2:SetCountLimit(1, id)
	e2:SetCondition(s.thcon)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
end
function s.rlevel(e, c)
	local lv = aux.GetCappedLevel(e:GetHandler())
	if c:IsSetCard(SETCARD_ID_0) then
		local clv = c:GetLevel()
		return (lv << 16) + clv
	else
		return lv
	end
end
function s.thcon(e, tp, eg, ep, ev, re, r, rp)
	return bit.band(r, REASON_EFFECT) ~= 0
end
function s.filter(c)
	return c:IsSetCard(SETCARD_ID_0) and c:IsType(TYPE_RITUAL) and c:IsRace(RACE_WARRIOR) and c:IsAbleToHand()
end
function s.thtg(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsExistingMatchingCard(s.filter, tp, LOCATION_DECK, 0, 1, nil)
	end
	Duel.SetOperationInfo(0, CATEGORY_TOHAND, nil, 1, tp, LOCATION_DECK)
end
function s.thop(e, tp, eg, ep, ev, re, r, rp)
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_ATOHAND)
	local g = Duel.SelectMatchingCard(tp, s.filter, tp, LOCATION_DECK, 0, 1, 1, nil)
	if g:GetCount() > 0 then
		Duel.SendtoHand(g, nil, REASON_EFFECT)
		Duel.ConfirmCards(1 - tp, g)
	end
end

