Hi @brevalessio
Thanks for the post.
I would recommend that you pass the actual $term object like so:
function selectArchetype()
{
$terms = get_terms([
'taxonomy' => 'archetype',
'hide_empty' => false,
]);
foreach ($terms as $term) {
$fields = get_field('must_have_cards', $term);
var_dump($fields);
}
}