/**
@fn FLAG_UNDEAD
@section Use
<table>
<tr>
<th>Type(s)</th>
<th>Description</th>
</tr> <tr>
<td>
@ref page_type_212, @ref page_type_28
</td><td> Several spells only affect undead monsters:
turn undead, banish undead, holy word, etc.</td>
</tr>
*/