Starting Spells

Players each start with 4 'family' spells; story-relevant cantrips (with one L1 spell) that they would have seen so often they can cast them almost immediately upon getting their own wands. Perhaps their parents even lent them their wands for some (carefully supervised and Decree for the Reasonable Restriction of Underage Sorcery, 1875 compliant!) magical pre-schooling before our story even began.

All players also start with one offensive spell (Devicto) and one defensive spell (Protego) in both its action and reaction form. This is in acknowledgement of the fact that we are still essentially playing DnD, so to have no combat spells at all would be challenging.

School-Taught Spells

Most witches and wizards learn their repertoire of spells at Hogwarts, Ilvermorney or some similar school and go on to use these throughout their entire lives.

At Hogwarts School of Witchcraft & Wizardry, the curriculum is broken down into:

Core curriculum (mandatory yrs 1-5)

Elective Subjects (min 2 from yr2)

Advanced Subjects (yrs 6-7)

Throughout your school year you will be taught a pre-determined curriculum of spells from the core subjects as well as according to your elective options. As you are defined as DIADEMs, you will also be able to request and commit downtime to) a few additional lessons in each School of Magic, giving an opportunity to learn even more, even faster.

When spells are taught in a classroom environment, they can be practiced safely and an expert is there to correct your actions. As a result, no penalty is incurred when you start casting such a spell 'in the real world', unlike those taught by other means.

Teaching Yourself Spells

Books abound in the Wizarding World and even the most casual observer in the courtyards of Hogwarts or on the cobbles of Diagon Alley would overhear and observe spells of all varieties being pinged about. But casting such a spell yourself is more challenging.

Any time you try to teach yourself a new spell, or if you are learning it from another student rather than a trained educator, you will need to:

Info

DM Note: For consistency across the campaign I will try to apply general principles to downtime calculations. Currently I'm thinking downtime required would be something like:

(spell level) x 4 x (highest level at which it could be cast)

So a L1 spell that can be cast all the way up to L7 would be: 1 x 4 x 7 = 28 hours

Or a L3 spell with no upcast would be: 3 x 4 = 12 hours

Finding a mentor

Sometimes you may meet people who can teach you a thing or two. This could negate the self-taught disadvantage (DM discretion).