The opportunity presented itself.
However, at the same moment it was an opportunity for Spot to use Gentle Gaze; it was also the same for the bird-like beast.
Lucas felt terror freezing his body and making his mind scream danger when he met the gaze of the bird beast earlier.
From that, one could immediately guess that it was also using an ocular skill that could somehow make its target feel terror or dread so vast that their body can literally freeze.
In a sense, it was the same skill as that of Gentle Gaze—cast in Hellhound Manifestation form—only the bird's skill brought more dread towards its enemy compared to Gentle Gaze, which was focused on entrancing the enemy to immobilize them.
Both skills more or less achieved the same result, but each was done in a different manner.