The concept of Magic: the gathering

Every game of Magic is designed to represent a battle between
two or more opposing “Planeswalkers.” Planeswalkers are powerful
magicians with the ability to make bonds with the lands they have
Visited and use the magical energy found in those lands to cast spells.
The goal of the game is to defeat the opposing Planeswalkers by using
the spells you have available.

Each player in a game of Magic begins the game with 20 life
points. The most common way to achieve Victory is to reduce the
opposing players life points to zero. You can do this by using
summoned creatures to attack your opponent or by using spells that
target other players and deal damage. There are also other less
common routes to Victory.

At every turn, a player must draw a new card from their library
(their deck of cards). If unable to do so, that player loses the game.
With the addition of newer sets, you can also gain a win by poisoning
your opponent. Poison is dealt like normal damage by special
creatures and spells, but you only need to deal 10 points of poison
damage to kill your opponent!