The Wizard: All the Power, None of the Safety Net
The wizard is the most naked class in 5th edition. Not in the fun way. Two skills, no armor, a d6 hit die, and a handful of proficiencies so underwhelming that “darts” is on the list. What the wizard trades all of that for is the largest and most flexible spell list in the game, and a relationship with magic that no other class has: they earn every single spell.
The spellbook is the mechanic that defines everything. It is a physical object, it takes up space, it can burn. Copying a new spell into it costs 2 hours and 50 gold per spell level, which keeps acquisition from being trivial, but the real tension is in what happens when you lose it. The spells you have prepared can be rewritten. The ones sitting in the book that you never got around to preparing? Gone. The backup rules exist for exactly this reason: 1 hour and 10 gold per spell level to copy an existing entry into a second book. Write that down somewhere. Preferably not only in your spellbook.
This vulnerability is genuinely interesting from a design standpoint. A sorcerer loses nothing when captured. A wizard loses everything. That asymmetry opens up scenarios no other class creates naturally, whether it is a dungeon run to recover a stolen book, a session where your wizard has to function on cantrips and borrowed scrolls, or the slow horror of watching a fireball scorch the one page that had Fly on it.
Arcane Recovery and Spell Mastery
The one class feature wizards get before their subclass at level 2 is Arcane Recovery. Once per day after a short rest, they recover spell slots whose combined level equals half their wizard level rounded up, with nothing above 6th level. It is not flashy, but it means a wizard is putting out more spell slots per adventuring day than any other full caster.
Spell Mastery at level 18 is where the chassis pays off properly. One 1st-level spell and one 2nd-level spell become effectively cantrips, castable at will without spending a slot. Infinite Magic Missile. Infinite Invisibility. Changeable after 8 hours of study. For a class that often feels like it is coasting on subclass features for twenty levels, this is a genuinely good reward.
Signature Spells at level 20 is a step down. Two 3rd-level spells that are always prepared and can each be cast once per short rest without a slot. It is fine. It just has the misfortune of following something as clean as Spell Mastery.
The wizard suits multiclassing well, arguably better than most classes. It asks so little of you physically that a fighter, a paladin, or really anyone who wants access to the spell list can dip in and make something memorable. A paladin with holy spells inscribed on their shield is a better concept than half the builds people spend hours theorycrafting.
Eight subclasses in the Player’s Handbook. A spell list that scales with your willingness to hunt for scrolls. A backup book you should probably make tonight. The wizard is as open as the rules allow.