Magic circle is the rules and goals in a game that define the game itself, because without rules and goals there would not be a game. So in other words magic circle is the area where a person is agree to obey and do what the rules and goals is set for him.
e.g. when playing football then a person must obey the rule such as, only play inside the designated area (110 meters x 45 meters field) and once the ball is out of the field the player must obey punishment of losing the right of the ball. This situation explain how magic circle actually is.
In Boxing the magic circle is the rules that you have to punch your opponent and win the game whether by having the hit on target or by knocking out the opponent, punching other people is bad but once you enter magic circle in Boxing, you will not have any choices anymore.
While lusory attitude is the awareness of a player to obey and involve in rule of the game, and also the boundaries of what can the player do and cant do. E.g. in soccer lusory attitude is to not touch the ball with hand because by touching the ball by hand it would not allowed in the game.
The same case in card game is that when player able to see other people cards then there is no point of continuing the game since the rules are being broken, also in soccer the need to score goal to opponent goal is the main point of the game, if the teams who play soccer doesn’t have lusory attitude then the game will be useless since no one try to attempt to make goal.
Huizinga argue that play is waste of energy, to some extent I do agree with this, e.g. when I play soccer I do not fell any real benefit from it except from the enjoyment of playing it, but in other case a professional soccer player would have different dimension for them it is not waste energy, it is their job and they get paid for playing, this extent oppose the Huizinga opinion of play is only wasting energy and not give any benefits in real life.