写一个触发技，看描述应该是锁定技
在自己的回合开始前触发，遍历场上所有人的判定区，如果有闪电则获得

xxx = sgs.CreateTriggerSkill{
----name = "xxx",
----frequency = sgs.Skill_Compulsory,
----events = {sgs.TurnStart},
----on_trigger = function(self, event, player, data)
--------if player then
------------for _,p in sgs.qlist(player:getRoom():getAllPlayers()) do
----------------for _,trick in sgs.qlist(p:getJudgingArea()) do
--------------------if trick:objectName() == "lightning" then
------------------------player:obtainCard(trick)
--------------------end
----------------end
------------end
--------end
--------return false
----end
}
未测试