You are playing some old skool D&D with your friends and decide that you want to play a magic-user. The DM tells you that level 1 magic-users can only cast one spell per day and, to add injury to the insult, “your starting spells are chosen at random.“
You start sweating profusely, but being a hardcore masochist, you accept the ruling and allow Eris, Princess of Chaos and Dice-Rolling, to decide that your magic-user knows three spells (plus Read Magic) of astounding power: Detect Magic, Light, and Magic Missile. Unfortunately, your DM is an ass and does not even know that Light can be used to blind enemies, and, to make things worse, he also uses some weird rule for Magic Missile (1d6+1 of damage, but an attack roll is needed.) In practical terms, that means the destructive power of your character is similar to being able to shoot a single arrow each day. 10 years at the Magic University for this?!