Check the current Resource Drill panel, then use Fuel Cells only when the available rewards match your account goal.
Guide overview
Where to open a Geode
The earlier creator video highlights a simple but easy-to-miss step: obtain the Geode through the Resource Drill, then use the Hollow NPC at the Drill entrance rather than looking only at equipment interfaces.
The earlier describes the Drill as an Expedition Hub structure. Confirm it is constructed on your account and read the live panel for its current Fuel Cell cost, timer, and output chance.
Guide notes
The earlier reference records Level 1 and Level 2 Drill states, each with a 300-second processing interval and different stated Geode rates. Those values are useful historical details but should not be treated as a current efficiency calculation after an update.
Use Fuel Cells only after comparing the output you need. A player chasing an equipment lock, Trait Crystal, or basic currency may value the same Geode differently, and the current live pool decides whether the investment still makes sense.