The One Year Anniversary card pack was a limited pack available from May 7, 2013 to May 11, 2013 at 11:59 PM (PST).
The pack was released to celebrate the one year anniversary of the day the game was made. All cards featured in the Legends Card Pack at the time of this promotion were included with a higher draw rate for Ultra Rares. Draw rates started at normal for the first draw, with successive draws increasing the draw rate to five times the normal rate on the fifth draw, with a random chance to achieve the maximum rate on any draw before the fifth.
Additionally, the card pack also featured two new cards, one Rare and one Ultra Rare.
Additionally there was Login Stamp Compain featuring Curious Witch of Sabato.