card types and can be either a Champion or a Follower card. A unit card can be played by spending Mana equal to its cost, and fulfilling any additional conditions in the card text, which summons it. A unit has a Cost, Power and Health. A unit can also have additional card text that has its own effects, usually only when the unit is alive.A unit is one of the main
Ally in card text refers to an allied unit. Enemy in card text refers to one of your opponent's units.
A champion is able to Level Up to transform it and every other allied copy of it in the game that could ever exist into a new card instantly, keeping all effects applied to it and damage taken, which has its own interactions as well. While there is an allied champion alive, any copies of it in hand are instead a Champion Spell.
Followers are a type of unit card in Legends of Runeterra, with numerous cards that only interact with them.