6 printings listed in our catalog, from newest to oldest.
, Mill a card: Add 
. (Activate only as an instant. To mill a card, put the top card of your library into your graveyard.)No reference price for this printing yet: not enough stores to make an average.
Run a comparison: we query the stores live, it may have arrived this morning.
Once Deranged Assistant’s ability has been activated, it can’t be reversed for any reason. If you activate it while casting a spell and discover you can’t produce enough mana to pay that spell’s costs, the spell is reversed. The spell returns to whatever zone you were casting it from. You may reverse other mana abilities you activated while casting the spell, but Deranged Assistant’s ability can’t be reversed. You’ll still have any mana the ability produced, and the milled card will still be in your graveyard.
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