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Later tonight Cryptic will be implementing a new mission, "Hearts and Minds", for Friday 13th (and apparently, will add it every time a Friday the 13th or other "spooky" day comes around). It will remain live until Saturday evening.
It will supposedly be fairly short, so easy to accomplish with multiple characters:
"Hearts and Minds" is a new mini-mission that explores the consequences of some unconventional research gone awry. This mission is a “story in one act,” so you can easily finish it in a quick play session, and it’s easy to complete it with any additional characters that you may have on your account – which is handy, because the mission offers some special unique rewards."
Hell hath no fury like an MMORPG player scorned.