Elf's Serpent Strangling

In his previous life, he was an ordinary person who was obsessed with the study of elf battles. He knew the characteristics, skill chains, and cultivation routes well. When he opened his eyes again, he became an orphan in the slums of Kuye City. His pockets were empty except for an Arbor snake egg that was about to hatch. 1. Dark flow, the protagonist kills decisively, not the Virgin 2. Elves will be injured and die, and fighting has a price. 3. Use knowledge and tactics to fight across levels without relying on system cheating 4. The protagonist is cruel to his enemies and very kind to his own people. Qualification system: red→orange→yellow→green→green→blue→purple→dark purple Pokémon, Darkness Style, Decisive Killing, Tactical Style, Nurture Style, Slow Heat, Growth