The order has been given.
Silent instructions are transmitted instantaneously along the mycelium network that spreads underground.
The microscopic strains hidden in the cracks in the rock wall of the narrow passage trembled at the same moment, and then burst.
Billions of "hallucinogenic spores" were released. They were colorless and odorless, but carried a pheromone that was extremely attractive to primitive organisms, and quickly filled the air.
A long and narrow underground passage instantly turned into a saturated gas chamber.
This is the first meal prepared for the incoming "guests".