Giant Chest
Giant Chests are tied as the third most common chest in Clash Royale. Through a normal 240 card chest cycle a player can expect to unlock only four Giant Chests. Giant Chests will guarantee a player many rare and common cards and also have a good chance at containing an epic card. A Giant Chest will take 12 hours to unlock. If a player chooses they can immediately unlock a Giant Chest for a maximum of 72 gems.
Giant Chests show up at predictable times in the 240 card chest cycle. The Giant Chest will show up the 48th, 155th, 187th, and 227th slots in the cycle.