Go-Shintai of Life's Origin reflexive trigger and shroud
If you have shroud of all of your shrines, and you accidentally pay for Go-Shintai's trigger, there is no way to "fail to find" or whatever and the game makes you time out or concede.
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Rezzahan#77802 commented
The only target for Go-Shintai of Life's Origin is a single card in ypour gravewyard, where shroud does not work. If you have an enchantment in your graveyard, you can target it. When you went through the whole process of activating the ability, the only thing left is to return the card you targeted when the ability resolves. Of course you cannot fail to find, you are not searching. What is to be returned was determined already.