daggerheart/templates/sheets-settings/environment-settings/adversaries.hbs

<section class='tab {{tabs.adversaries.cssClass}} {{tabs.adversaries.id}}' data-tab='{{tabs.adversaries.id}}'
    data-group='{{tabs.adversaries.group}}'>
    <button type="button" class="add-action-btn" data-action="addCategory">
        {{localize "DAGGERHEART.GENERAL.newCategory"}}
    </button>
    {{#each document.system.potentialAdversaries as |category categoryId|}}
    <fieldset class="category-container" data-potential-adversary="{{categoryId}}">
        <legend>{{category.label}}</legend>
        <div class="category-name">
            <input type="text" name="system.potentialAdversaries.{{categoryId}}.label"
                value="{{category.label}}" />
            <a data-action="removeCategory" data-category-id={{categoryId}} data-tooltip='{{localize "CONTROLS.CommonDelete"}}'>
                <i class="fa-solid fa-trash"></i>
            </a>
        </div>
        <div class="adversaries-container">
            {{#each category.adversaries as |adversary|}}
            <div class="adversary-container">
                {{> 'daggerheart.inventory-item'
                item=adversary
                type='adversary'
                isActor=true
                categoryAdversary=categoryId
                }}
            </div>
            {{/each}}
        </div>
        <div class="drag-area">
            <span>{{localize "DAGGERHEART.GENERAL.dropActorsHere"}}</span>
        </div>
    </fieldset>
    {{/each}}
</section>