The Apocalypse Is Here, and You Have an Options System

[Dungeons] + [Superpowers] + [Leveling] + [System]

Chosen as a candidate from the start, your weapon is a farming tool: an iron shovel. You choose to use it to:

a. Dig holes and bury fertilizer, helping saplings grow tall

b. Take down a zombie with your shovel and claim a crystal core. As long as you shovel fast enough, even Long Aotian can't out-earn you.