Doug pulls Akz backwards. As the goblin flies back five feet, turquoise goop falls from the ceiling onto him. It begins to spread over him, along the ground and from the hole in the ceiling it was released. The slime begins enveloping the mushrooms which causes them to react, triggering every mushroom in the patch. Their bulbs contract and spores shoot out in every direction.
[With the given order and placement of the characters, Doug and Acker need to make a DC 12 reflex save and Billie makes a DC 8 one. On failure make a DC 15 fort save]