While Cliff, a 27 year old young man, was visiting his grandparents, he was caught in what is called a "summoning" which took him to a forest infested with unknown creatures, he decided that in order to survive, he should be ready to brave all the dangers that would present to him, with his “drain” skill he would fight them to become stronger
"Imbued beasts" are creatures that elves have tamed using a form of spell similar to the soul pact.
Once the creature is subjugated, its owner can gain access to the creature's senses, although for a time limit it can be effective for espionage and information sharing.
The elves mainly use these creatures as a means of communication, between themselves during hunting sessions, between clans to warn them of dangers or to send invitations of some kind, and they also served as means of declaring feelings.
In elf culture, a young elf in love would use a dove to send a letter to her lover and the same for her male counterpart who would send him his response.
Using "earth rodents", small beasts no bigger than the size of a hand, which gnaw the head to move, thanks to them, they managed to penetrate inside the Dhakat village now occupied by ogres.