When Lillian cast the summoning spell, her goal to kill everyone apart from her son was shared with all of the creatures that were to come through the portal.
So as the humans made a run for their lives, the Gargoyle also flapped its wings in order to chase after them. However, it bumped into something that was invisible to him. It tried to fly again but it hit the barrier again.
Sybil, who was looking at the Gargoyle from behind took a sigh of relief. And she thought to herself, "The barrier might hold him off for about a minute. Sisters, I hope that you all will come to aid before things go out of control."
Thankfully, the witches had taken a precaution while creating the barrier. They had taken the prophecy into consideration and had cast the barrier to trap any supernatural beings inside of it.
However, the moment of relief quickly faded for Sybil when she noticed something hovering right behind that portal to Hell.
