Blue mana is a type of magical energy found in the game Magic: The Gathering. It represents the element of knowledge, illusion, and control. Players use blue mana to cast spells that allow them to draw cards, counter opponents' spells, and manipulate the game in strategic ways. In the game, blue mana is generated primarily by islands, which are one of the basic land types. Spells that require blue mana often focus on outsmarting opponents, creating illusions, or gaining information, making blue a color associated with intellect and cunning tactics.