A Spectre pack that costs 99,000 credits. It's guaranteed to have two Rares and a higher chance at an Ultra Rare. Not sure if it's limited time or what, but it's the one I saved up for tonight. A lot of people seem to be missing the Salarian Infiltrator and the pack helped me nab him, so I'd say it was worth it.
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Yoblazer: http://oi52.tinypic.com/ad21i1.jpg
Watch and you'll see... someday I'll be... part of your world!