Beast Taming Invincible Others Spend Money I Spend Life

[Beast Taming + Rank Up + Evolution + Invincibility + Pets + No Female Lead, Focus on Career]

Xu Ming transmigrated to the world of beast taming, only to encounter a life-or-death crisis right from the start:

Low talent? Who said the Iron-Eating Beast is just a cute pet?

It's okay, others spend money on in-game purchases, I'll spend my life:

Kill monsters, demons, and other alien creatures, and plunder their lifespan.

Consuming the lifespan of an alien species to add stat points: accelerates the growth of pets or beast tamers.

Iron-eating beast... Iron-eating beast commander... King... Iron-eating war god

Mutant skeletons... Lich... Undead Lord

Dragon eggs are hard to hatch? How about I speed things up by 10,000 years?

...

Monster horde? Monster disaster?

With your life, I will build my invincible path.