Global Cataclysm: Starting with Zombie Sacrifice

Apocalyptic disaster, zombies have taken over the entire world. Fortunately, the awakening sacrifice system allows you to sacrifice zombies at the beginning. "Ding! You sacrifice an ordinary zombie and get immunity potion!" "Ding! You sacrifice the zombie dog and gain a keen sense of smell." "Ding! You sacrifice the zombie king and get the regeneration potion." "Ding! You sacrifice mutated plants and get a plant castle!" There is nothing that sacrifice cannot solve. If there is, it must be myself!