I often forget to use my feat. It has happened time and time again. But no-longer, for I have found a solution! A wander through the bitz box (on the hunt for something completely different) I struck upon an awesome idea.
Leftover from the plastic GW giant were a couple of feet, too big for most other conversions, but the wheels were turning. The trolls use barrels (from Pegasus games) to mark their fury, so I attached the feet, some plastic stacks, and hair (for smoke). After a bit of greenstuff it was good to go.
Now, once per game, my warlock can summon the automated feats to follow them around causing good stuff to happen.