It was printed in Magic 2013 (2012), but that wasnt the deck it was found in (it was in one of the Return to Ravnica Event Decks)
Normally, the winter set doesn't start design until the fall design wraps up, but because Gatecrash is a large set, the two sets overlapped design for about six months
If a creature you control is enchanted with multiple Auras that have umbra armor, and the enchanted creature would be destroyed, one of those Auras is destroyed insteadbut only one of them
Turn 2 Raise the Alarm into turn 3 Hordeling Outburst followed by turn 4 Jeskai Ascendancy, convoke out Stoke the Flames and Triplicate Spirits and attack for fifteen sounds ridiculously powerful and there are a number of different variations on that theme abusing the convoke mechanic
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