Investigate a Suspicious Lump of Clay to get infused with magic, choose a ritual to specialize, then use Specialization spells, focus on an alignment, and unlock more spells! Become a master of Specializations, along with mastery of the Black Arts or White Arts and specialize further with a ritual of your choice.
To obtain the Sorcerer Trait on a particular sim, you need to go into Build Mode and place a Suspicious Lump of Clay anywhere on the Lot (this is a variation on the Lump of Clay added through the mod).
The Suspicious Lump of Clay has one interaction on it: Investigate Object. The tooltip says the consequences of investigating may be permanent, but with 2.0 and beyond, you can remove the trait using the Suspicious Lump of Clay.
When the interaction completes, your sim will now have a new hidden trait and a Spells menu with a toggle “Show/Hide Magical Energy Tingles,” even if they are as young as Toddler. Toddler and older can get the trait, but Toddlers and Child sims have a different (and very limited) experience. Teen or older gets access to all the main features of the trait.
See the Toddler and Child sections respectively for information on how the trait works for them. The rest of the mod info will be based on sims who are Teen or older.