wondering what the reqs are to trigger the reward.

in my current playthrough (multiple save points) ive done the following and the gargoyle at the tower never speaks or offers a reward...

1 teleport straight to tower, no skulls
2 open 6 doors to get to tower
3 open 3 doors, keep 3 skulls
4 teleport and have 6 skulls in my bags

what am i kisising here?