This Sect Is Too Outrageous

When I first started, the leader kindly handed me the skills: "My good disciple, this is the first lesson - how to kill the master gracefully." The subjugated prince thought that joining the sect would be the pinnacle, but unexpectedly, all members of the sect were ancient beasts, and he had no products and was forced to take on sky-high loans. In order to repay his debt, he dug up the ancestral graves in the world of cultivation, cheated the fairies out of their hearts, and lived the life he hated most. Cultivation requires loans, breakthroughs require credits, and even watching the exercises requires watching a 30-second commercial first! But he knew that as long as he killed a certain master, he could graduate immediately. Looking at tens of thousands of famous teachers, I fell into deep thought - which beast should I start with first?