Signal from the Depths

Signal from the Depths is the fourth booster pack of the HCCG, following Underworld's Balance. It has a total of 115 cards, including one card from the Yu-Gi-Oh! anime. This pack contains cards made by Hippocampus, Chris, Nexus Pro, Lunateam, and Lea, and they were all made in the years 2012 and 2013.

This set was the first set to have only cards that were made after the reset of the HCCG, and as such it keeps the balance of the metagame in mind. It contains a few new Synchro Monsters of various levels, as well as a variety of new Fusion Monsters. It also contains many FIRE and LIGHT monsters and includes support for decks of those Attributes, while also adding more support for WATER, Thunder, and Aqua decks as well as Dragon decks. It introduces the Oophagous, Pentagram Dragon, Mamunia, Bluster, Destructive Dog, and Jurrapdoor archetypes to the HCCG, and it provides further support for the O'hahra, Tear, Larvas, Antediluvian, Tanooki, Jinzo, LuckySoul, Swordsmistress, and Charmer archetypes.