Airorca
Once per turn: You can banish 1 Fish, Sea Serpent, or Aqua monster from your hand, then target 1 face-up card your opponent controls; destroy that target, then banish this card until your next Standby Phase.
local s, id, o = GetID()
function s.initial_effect(c)
	--destroy
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCategory(CATEGORY_DESTROY + CATEGORY_REMOVE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(s.descost)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
end
function s.cfilter(c)
	return c:IsRace(RACE_FISH + RACE_SEASERPENT + RACE_AQUA) and c:IsAbleToRemoveAsCost()
end
function s.descost(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsExistingMatchingCard(s.cfilter, tp, LOCATION_HAND, 0, 1, nil)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_REMOVE)
	local g = Duel.SelectMatchingCard(tp, s.cfilter, tp, LOCATION_HAND, 0, 1, 1, nil)
	Duel.Remove(g, POS_FACEUP, REASON_COST)
end
function s.filter(c)
	return c:IsFaceup()
end
function s.destg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	if chkc then
		return chkc:IsOnField() and chkc:IsControler(1 - tp) and s.filter(chkc)
	end
	if chk == 0 then
		return Duel.IsExistingTarget(s.filter, tp, 0, LOCATION_ONFIELD, 1, nil)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_DESTROY)
	local g = Duel.SelectTarget(tp, s.filter, tp, 0, LOCATION_ONFIELD, 1, 1, nil)
	Duel.SetOperationInfo(0, CATEGORY_DESTROY, g, 1, 0, 0)
end
function s.desop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	local tc = Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) and Duel.Destroy(tc, REASON_EFFECT) ~= 0 and c:IsRelateToEffect(e) then
		Duel.BreakEffect()
		if Duel.Remove(c, 0, REASON_EFFECT + REASON_TEMPORARY) ~= 0 and c:GetOriginalCode() == id then
			local e1 = Effect.CreateEffect(c)
			e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_CONTINUOUS)
			e1:SetCode(EVENT_PHASE + PHASE_STANDBY)
			e1:SetCountLimit(1)
			e1:SetLabelObject(c)
			e1:SetCondition(s.retcon)
			e1:SetOperation(s.retop)
			e1:SetReset(RESET_PHASE + PHASE_STANDBY + RESET_SELF_TURN)
			Duel.RegisterEffect(e1, tp)
		end
	end
end
function s.retcon(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetTurnPlayer() == tp
end
function s.retop(e, tp, eg, ep, ev, re, r, rp)
	Duel.ReturnToField(e:GetLabelObject())
end


Airorca
Once per turn: You can banish 1 Fish, Sea Serpent, or Aqua monster from your hand, then target 1 face-up card your opponent controls; destroy that target, then banish this card until your next Standby Phase.
-- Airorca
local s, id, o = GetID()
function s.initial_effect(c)
	--destroy
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCategory(CATEGORY_DESTROY + CATEGORY_REMOVE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(s.descost)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
end
function s.cfilter(c)
	return c:IsRace(RACE_FISH + RACE_SEASERPENT + RACE_AQUA) and c:IsAbleToRemoveAsCost()
end
function s.descost(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsExistingMatchingCard(s.cfilter, tp, LOCATION_HAND, 0, 1, nil)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_REMOVE)
	local g = Duel.SelectMatchingCard(tp, s.cfilter, tp, LOCATION_HAND, 0, 1, 1, nil)
	Duel.Remove(g, POS_FACEUP, REASON_COST)
end
function s.filter(c)
	return c:IsFaceup()
end
function s.destg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	if chkc then
		return chkc:IsOnField() and chkc:IsControler(1 - tp) and s.filter(chkc)
	end
	if chk == 0 then
		return Duel.IsExistingTarget(s.filter, tp, 0, LOCATION_ONFIELD, 1, nil)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_DESTROY)
	local g = Duel.SelectTarget(tp, s.filter, tp, 0, LOCATION_ONFIELD, 1, 1, nil)
	Duel.SetOperationInfo(0, CATEGORY_DESTROY, g, 1, 0, 0)
end
function s.desop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	local tc = Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) and Duel.Destroy(tc, REASON_EFFECT) ~= 0 and c:IsRelateToEffect(e) then
		Duel.BreakEffect()
		if Duel.Remove(c, 0, REASON_EFFECT + REASON_TEMPORARY) ~= 0 and c:GetOriginalCode() == id then
			local e1 = Effect.CreateEffect(c)
			e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_CONTINUOUS)
			e1:SetCode(EVENT_PHASE + PHASE_STANDBY)
			e1:SetCountLimit(1)
			e1:SetLabelObject(c)
			e1:SetCondition(s.retcon)
			e1:SetOperation(s.retop)
			e1:SetReset(RESET_PHASE + PHASE_STANDBY + RESET_SELF_TURN)
			Duel.RegisterEffect(e1, tp)
		end
	end
end
function s.retcon(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetTurnPlayer() == tp
end
function s.retop(e, tp, eg, ep, ev, re, r, rp)
	Duel.ReturnToField(e:GetLabelObject())
end

