<fieldset>
    <legend>{{ localize "DND5E.Spellcasting" }}</legend>

    {{!-- Spellcasting Progression --}}
    {{ formField fields.spellcasting.fields.progression value=source.spellcasting.progression localize=true
                 options=spellProgression rootId=partId }}

    {{!-- Spellcasting Ability --}}
    {{ formField fields.spellcasting.fields.ability value=source.spellcasting.ability choices=CONFIG.abilities
                 labelAttr="label" blank="" localize=true rootId=partId }}

    {{!-- Preparation Formula --}}
    {{ formField fields.spellcasting.fields.preparation.fields.formula value=source.spellcasting.preparation.formula
                 localize=true placeholder="—" rootId=partId }}

</fieldset>