--磁石の騎士β
--Beta the Magnet Cavalry
--scripted by YoshiDuels
local s,id=GetID()
function s.initial_effect(c)
	--Fusion Procedure
	c:EnableReviveLimit()
	Fusion.AddProcMixN(c,true,true,39256679,1,s.matfilter,1)
	--1 monster gains 300 ATK and gains piercing
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
s.named_material={39256679}
function s.matfilter(c,scard,sumtype,tp)
	return c:IsRace(RACE_ROCK,scard,sumtype,tp) and c:IsLevelBelow(4)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDiscardDeckAsCost(tp,2) end
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsFaceup,tp,LOCATION_MZONE,0,1,nil) end
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	--Requirement
	if Duel.DiscardDeck(tp,2,REASON_COST)<0 then return end
	--Effect
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATKDEF)
	local g=Duel.SelectMatchingCard(tp,Card.IsFaceup,tp,LOCATION_MZONE,0,1,1,nil)
	if #g>0 then
		Duel.HintSelection(g)
		local tc=g:GetFirst()
		--Gains 300 ATK
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(300)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		tc:RegisterEffect(e1)
		tc:AddPiercing(RESETS_STANDARD_PHASE_END,c)
	end
end