Shortly after celebrating its eighth birthday, Blizzard Entertainment's Hearthstone is taking players where they've never gone before in the collectible card game...under the sea.

On Thursday morning, the company announced the name and theme of the first card expansion of 2022, Voyage to the Sunken City, set to launch on April 12.

Set to take place in the underwater city of Zin-Azshari, players will join a group of explorers to see what Naga and other denizens of the deep have to offer the world.

The 135 card set will introduce two new keywords and a minion type familiar to those who've played the World of Warcraft title over the years.

The first keyword introduced in the set is Colossal which is described by the development team as:

"The ocean depths are home to many massive monsters unlike anything you’ve seen before. These giant creatures are too big to fit on one card! Minions with the Colossal keyword come with extra appendages that synergize with their main body in powerful ways. These appendages are summoned with the main body, even if the Colossal wasn’t played from hand."

Two Legendary Colossal cards were revealed alongside the expansion's name:

The other keyword being introduced is Dredge which helps solve a problem that has plagued Hearthstone players for almost a decade and cost millions of games.

"Don’t you hate it when the one card you need is at the very bottom of your deck? Not any more! Dredge is a new keyword that lets you look at the bottom three cards of your deck and pick one to bubble up to the top. You can combine these Dredge cards with new Azsharan cards that send a powerful “Sunken” card to the bottom of your deck. Whether it’s sunken treasures, your cool new Legendary, or a well-timed burn spell, Dredge can help you get just what you need."

The newest minion type coming to the game is the magical and sometimes nasty Naga. Led by Queen Azshara and rulers of the deep, Naga will rewards players whose deck carries a handful of spells in them.

"Destroyed by their thirst for power and cursed for all eternity, the vengeful Naga are a new minion type coming with this expansion and becoming a permanent addition to Hearthstone. The Naga are a spell-focused minion type that tend to give bonuses for playing one or more spells while the Naga are in your hand."

More and more cards will be revealed in the upcoming weeks prior to the expansion's launch on April 12.