its restrictive casting cost allows the designers to give it an enormous amount of power for a five mana card
No, not because of Damping Sphere -- nobody but Seth would run that -- but more the fact that any non-green deck is going to be running lots of mana rocks by necessity, so blowing them up can really slow them down, which means they'll be slower to respond to your combo turn
Rakdos Charm is the perfect antidote to this kind of problem (although not the specifically the Moat one...), it can deal with a selection of troublesome things while remaining useful outside of this scope and perfectly maindeckable without fear of having dead cards or losing much consistency
Collector Booster Contents (Collector Boosters are available in English, French, German, Italian, Japanese, and Spanish) 1 Foil-etched Mystical Archive rare or mythic rare The only place to get foil-etched Mystical Archive cards is in the Collector Booster
The "Then look at the top card of your library
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