Just like other cheap cantrips like Opt or Consider, Brainstorm is worth playing in spell-based decks, but probably not in anything else
A cheap, evasive threat that replaces itself and functions offensively and defensively is strong, but the artifact card type makes this appealing to a broad range of decks
That discount isnt huge, but its still very welcome, especially as we tiptoe closer to launch
(A player with ten or more poison counters loses the game.) Whenever a creature you control with deathtouch deals combat damage to a player, that player gets two poison counters
Magister Sphinx Dropping someone straight to 10 life is a huge power move, and Magister Sphinx does exactly that the moment it enters the battlefield
While this would require your opponents to be drawing all the time, thankfully, thats hardly uncommon in Commander