From LSWiki

Working with the Gleepi's feep attack

The special attack the gleepli itself does, called "feep", actually consumes spiritual energy, which can run out. It may be useful to urge the gleepli to 'stop attacking with feep', or to fire it on demand with 'perform special attack of feep (at soandso)'.

This dovetails really nicely with the harmonist talent.