Colorless cards are a type of card in the Magic: The Gathering trading card game that do not have a specific color identity. This means they can be played in any deck, regardless of the colors of mana a player is using. Colorless cards often represent artifacts or lands and can provide unique abilities or resources without being tied to a particular color's strengths or weaknesses. In gameplay, colorless cards can enhance a player's strategy by offering versatile options. They can be used to support various deck types, allowing for creative combinations and synergies. Some notable colorless cards include Sol Ring and Wastes, which are popular for their utility and efficiency in many decks.