School of Hard Knocks

There are many ways to learn magic, reading books is the least fun of them. Wizards of the School of Hard Knocks learn magic through experience and experimentation rather than rote memorisation in dusty old libraries. Though such work is not without risks, these wizards enjoy the thrill of the unknown and the dangers that go with it. 

Failure is the Best Teacher

Beginning when you select this school at 2nd level, You immediately learn any attack spell that hits you and any spell you fail a saving throw against. You spend no gold and only half the time to copy the spell into your spellbook. You may choose to fail a saving throw to use this feature. If the spell is not on the wizard spell list or of a level that you cannot cast you must succeed on an intelligence ability check (DC=10+the spell's level) to attempt to cast the spell, you may expend spell slots to gain a bonus on this roll equal to the total spell slot levels expended. You must choose the number and level of spell slots to expend before rolling. 

Elemental Experimentation

Starting at 6th level, you experiment with swapping elemental types of spells. When you cast a cantrip that deals fire, cold, thunder, lightning, or acid damage you may swap the type of damage for any other element. At 10th and 14th level you improve your experimentation and can swap elemental types of spells of 2nd level or lower, and 4th level or lower.

Not again!

Beginning at 10th level, you have advantage to dispel or counter any spell that has previously killed or reduced to 0 hit points you or one of your allies.

Practice Makes Perfect

Starting at 14th level, you learn to use your spell slots more efficiently. As an action, you regain one spell slot for each level of spell slot where you have expended all slots. This does not apply to spell slots of 6th level or higher. You gain one point of exhaustion every time you use this feature.