If you land this on an expensive spell, you really did swindle your opponent. That said, leaving 5 mana up is not trivial, and you aren’t even guaranteed to have expensive cards to play with all that hard-earned Treasure. I like this in control decks, especially ones with lots of other instants (so that you don’t waste your mana if you end up not being able to play this).
I agree Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our website without changing the browser settings you grant us permission to store that information on your device.