In reviewing my notes, I found something of use:
To close a gate to firmament requires 3 people.
1 true Mystic, 1 person who can cast an elemental dart, and 1 random person.
Step 1- Each person must draw a circle, making three concentric circles on a single piece of paper.
Step 2 - cast an elemental dart at the center of the drawing
Step 3 - the random person must vigorously rip the paper
Step 4 - the mystic Chants at the gate, which then shuts down.