Heart/en
From xat wiki
(HEART) - Heart shaped smilies LIMITED
Give a heart shape to any yellow smiley. To give smilies the shape of a heart add #h at the end of a smiley code e.g (biggrin#h). If you have multiple color powers, you can create custom coloured smilies, by adding colour code after #h, e.g (biggrin#h#ffffff).
NOTE: Only works with smilies in brackets.