In fact, I think that a single action could be valued at three resources, based only on the fact that when a player draws Emergency Cache they will eagerly play it
The fact that it has the line, "you control your opponents while they're searching their libraries," means you get to see your opponent's hand when they search
Then you may search your library for a basic land, reveal it, and put it into your hand
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Big Shield Gardna has the highest defense of any four-star monster in the format, making it a shoe-in even before considering its immunity to Nobleman of Crossout