As they were talking, Jacob picked up a stone to block the entry entirely. He was concerned of the security of the blockage and proceeded with sealing off the gap with clay. The remaining of the opening was just the size of a fist.
After confirming that this place was tightly secure, he lit up the pill in his hand and blocked the entrance firmly.
"What kind of medicine did you throw in?" Irene asked.
"I crafted the medicine myself. It's specially used against these dark creatures." He added with a smile, "I came prepared supplemented by the intelligence that the spy had gathered. I predicted that we will encounter with these dark creatures hence I prepared the medicine in advance. I knew it would come in handy."
As soon as the medicine was thrown in, a horrendous scream resonated from the cave. Obviously, Jacob's medicine was their enemies.