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If it is a curse deck, you can choose to obtain up to 3 clues at a time (draw a curse, discover a clue, and succeed in the test), or obtain 2 clues without consuming any charge (draw a curse, discover a clue, and succeed in the test), or at least 1 clue per charge (draw a curse, discover a clue, and fail the test)

This step isn't required, but is a smart precaution if you're mailing valuable cards

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Madness keeps an opponent second-guessing your moves, lets you cast powerful spells to cast for cheap, and with a bit of graveyard recovery, can be cast at nearly any time