Constructed is a term used to refer to decks which have been created using cards from the player's collection. Constructed play is play in either Play mode, Practice mode or Friendly Challenge. Duels may also be referred to as a constructed mode, as starting decks are built using cards from the player's collection. Some Tavern Brawls also use constructed decks, but due to the special rules and effects in play, are not usually referred to as constructed play.

The term is used to contrast with modes such as Arena, Battlegrounds, and Solo Adventures, where players generally play with cards outside of their collection. Constructed is the basic type of play for Hearthstone.

Notes

• Constructed is Hearthstone's main type of play, found in Play mode, Practice mode, Friendly Challenge, Duels, as well as some Tavern Brawls. In constructed play, the player does battle with an opponent, each using decks constructed from their own collections. Only cards found in the player's collection can be included in their deck, providing motivation to earn new cards in order to be able to include them in decks. Each constructed deck can only feature a maximum of 2 of any one card, and only 1 of each legendary card.
• In contrast, decks built in Arena and Duels are either partly or entirely random, and can include more than 2 copies of cards in decks.
• For more information about other modes, see Game mode.