Season 1, Episode 20:
The Age of Energy
Tsukasa plans a second attack after a few months of preparation. He has no idea what Senku and his kingdom are cooking up in the meantime.
Feats of Science:
- Cotton candy machine
- Gear mechanisms
- Iron hand saw - a "blade of science"
- Waterwheel
- Hydroelectric Plant
Tropes:
- Easy Communication: Discussed and averted - both sides know the limits of communication in the Stone World.
- Linear Warriors, Quadratic Wizards: The Kingdom of Strength grows in power linearly with time, as they revive more people. However, Tsukasa fears that, despite their fixed numbers, with enough time to advance, the Kingdom of Science will become even more powerful.
- Hard-Work Montage: Of the whole village making gold wire and Chrome and Kaseki's secret project.
- Serious Business: Making cotton candy and getting the texture juuust right.
- Shock and Awe: The closing image is Senku creating sparks from hydroelectricity.
- Through His Stomach: This time with cotton candy - and not just with the villagers.
- Title Drop: And how!
