--Aqualon the Abyssal Knight
local s,id,o=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	aux.AddOrigBigbangType(c)
	aux.AddBigbangProc(c,Card.IsNeutral,1,1,aux.NOT(Card.IsNeutral),1)
	--If this card would be destroyed by battle or card effect, you can banish 1 WATER monster from your GY instead.
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCode(EFFECT_DESTROY_REPLACE)
	e1:SetTarget(s.reptg)
	c:RegisterEffect(e1)
	--If this card is Bigbang Summoned: You can send 1 Level 4 or lower WATER monster from your Deck to the GY;  this card gains ATK/DEF equal to half the original ATK/DEF of the sent monster.
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetCountLimit(1,{id,0})
	e2:SetCondition(s.adcon)
	e2:SetCost(s.adcost)
	e2:SetOperation(s.adop)
	c:RegisterEffect(e2)
	--If this card destroys an opponent's monster by battle, after damage calculation: you can banish that opponent's monster, then you can banish 1 random card from your opponent's hand.
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetCategory(CATEGORY_REMOVE)
	e3:SetCode(EVENT_BATTLED)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,{id,1})
	e3:SetCondition(s.rmcon)
	e3:SetTarget(s.rmtg)
	e3:SetOperation(s.rmop)
	c:RegisterEffect(e3)
end
function s.repfilter(c)
	return c:IsAttribute(ATTRIBUTE_WATER) and c:IsAbleToRemove()
end
function s.reptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsReason(REASON_BATTLE+REASON_EFFECT) and not c:IsReason(REASON_REPLACE)
		and Duel.IsExistingMatchingCard(s.repfilter,tp,LOCATION_GRAVE,0,1,nil) end
	if Duel.SelectEffectYesNo(tp,c,96) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESREPLACE)
		local g=Duel.SelectMatchingCard(tp,s.repfilter,tp,LOCATION_GRAVE,0,1,1,nil)
		Duel.Remove(g,POS_FACEUP,REASON_EFFECT+REASON_REPLACE)
		return true
	else return false end
end
function s.adcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsSummonType(SUMMON_TYPE_BIGBANG)
end
function s.cfilter(c)
	return c:IsAttribute(ATTRIBUTE_WATER) and c:IsLevelBelow(4) and c:IsAbleToGraveAsCost()
end
function s.adcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_DECK,0,1,1,nil)
	Duel.SendtoGrave(g,REASON_COST)
	e:SetLabelObject(g:GetFirst())
end
function s.adop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsFaceup() and c:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(e:GetLabelObject():GetBaseAttack()/2)
		e1:SetReset(RESET_EVENT+RESETS_STANDARD+RESET_DISABLE)
		c:RegisterEffect(e1)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_UPDATE_DEFENSE)
		e2:SetValue(e:GetLabelObject():GetBaseDefense()/2)
		c:RegisterEffect(e2)
	end
end
function s.rmcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local bc=c:GetBattleTarget()
	e:SetLabelObject(bc)
	return bc and bc:IsStatus(STATUS_BATTLE_DESTROYED) and c:IsStatus(STATUS_OPPO_BATTLE) and bc:IsControler(1-tp) and bc:IsRelateToBattle()
end
function s.rmtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local bc=e:GetLabelObject()
	if chk==0 then return bc:IsAbleToRemove() end
	Duel.SetOperationInfo(0,CATEGORY_REMOVE,bc,1,0,0)
end
function s.rmop(e,tp,eg,ep,ev,re,r,rp)
	local bc=e:GetLabelObject()
	local g=Duel.GetMatchingGroup(Card.IsAbleToRemove,tp,0,LOCATION_HAND,nil)
	if bc:IsRelateToBattle() and bc:IsControler(1-tp) then
		if Duel.Remove(bc,POS_FACEUP,REASON_EFFECT) and g:GetCount()>0 and Duel.SelectYesNo(tp,909) then
			Duel.BreakEffect()
			local sg=g:RandomSelect(tp,1)
			Duel.Remove(sg,POS_FACEUP,REASON_EFFECT)
		end
	end
end