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Nuking a dual land and putting your opponent behind by a turn, while simultaneously putting yourself ahead by a turn (or four) seems devastating, especially if your curve continues well past 6 (which it ought to!) The question is not is this a good card, because the answer to that is, objectively, yes
MSRP is 39.99 at all local card shops and participating retailers
See also: Binder layout planner, Binder organization guide Is there a Silver Tempest master set checklist? Yes Cardrake provides a visual master set checklist for Silver Tempest with all 215 cards
If you're drafting or playing Sealed Deck, your Contraption deck can be however many Contraptions you draft or open in your Sealed pool, and it's okay if you have duplicates
To say I went through a lot of solutions like this is an understatement