Catch Your Last Chance to Acquiring Colors of Rainbow

Ranked Play Season 3: Colors of the Rainbow is coming to a close at the end of the month, and with it your chances of acquiring the Rainbow! card back for your collection. The Rainbow! Card back will only be available during Ranked Play Season 3, so be sure to hit Rank 20 before July 1st in order to qualify and don’t miss out! Reach Rank 20 or better and the card back will be awarded to you at the end of the season.

A $250,000 prize pool awaits at the Hearthstone World Championship: Are you game? The top 16 Legend players from Ranked Play Season 3 will qualify to participate at a Championship Qualifier Tournament! Find more detailed information at official site. Ranked Play Season 4—and a new card back along with it—await you in July!
You can click here to find the Hearthstone Legend Rank you are looking for.

From:http://www.hsmedal.com/news-87.html