比如：蛮勇：你可以将一张黑色手牌或装备牌当做南蛮入侵使用
manyong = sgs.CreateOneCardViewAsSkill{
name = "manyong",
filter_pattern = ".|black",
view_as = function(self, card)
local acard = sgs.Sanguosha:cloneCard("savage_assault", card:getSuit(), card:getNumber())
acard:addSubcard(card:getId())
acard:setSkillName(self:objectName())
return acard
end,
}
这个技能能实现但是可以无限放，怎样限制只能放2次呢？