Tournament Magic uses a time limit as a necessity in order to keep an event running smoothly. Most games and matches can be played in the time limits given. When the time limit is reached, unfinished matches will then play five extra turns (Two-headed giant games use three extra turns). If there is not a game winner at the end of those five turns, and assuming there is not a concession from either player, then the game will be a draw. If each player has equal game wins at that time, the match is a draw as well.
While there is an element of luck involved in every game of Magic, the idea behind Magic tournaments is to gauge the ability of players to play the game itself. A draw may not substantially benefit either player in the tournament, but that does not mean that players are allowed to determine the results of a match using a random method like rolling a die or flipping a coin. Players who even suggest doing so will be disqualified from the event. If both players in a match agree to roll a die to determine a match or game outcome (or if one player suggests it and the other player doesn’t immediately call a judge), then both players will be disqualified.
While sitting across from an opponent, it may be hard to realize the impact that something like randomly determining a result can have on a tournament. The standings and tie-breakers of other players in the event are based on and calculated using the results of matches they are not playing. Randomly determining a result does impact the entire event in a negative way.
If it hasn’t already been made clear, don’t randomly determine the outcome of a game or match. When you do so, everyone loses.