Last energy synth (Patreon)

So I just realized that this energy themed synth pin-up series I've had going for a while only has one instalment left! I thought there were still two left, but apparently I've already done 11 of them. One more and it can be turned into a calendar!

The types of energy we have covered so far are: Solar, Wind, Geothermal, Biomass (wood), Hydroelectric, Nuclear (Uranium), Stirling engine, Nuclear (Thorium), Fusion, Tidal and Hydrothermic.

Now we need to make a decision on what to do for the last one. There are a ton of concepts to choose from, but we have to narrow it down to something. Here are the three options I can easily think of good looking ideas for:

Algae: A type of power generation from biomass in the form of algae. This would be a very green synth, probably featuring green tanks with algae around various parts of their body.

Hydrogen Combustion: Take hydrogen and oxygen, light them on fire and you get a beautiful purple/red flame and water out of it! This synth would be styled around the looks of hydrogen combustion engines and would probably also feature the flame colour somehow.

Black Hole: This would be very, very sci-fi and not really based on any energy source we can feasably have now, but would be centered around the general idea of getting energy out of black holes, or black hole batteries, etc. Anything black hole related! Imagine a synth with black, purple and dark red theme and, naturally, a supermassive black hole far off in the distance behnd them.

Which of these would you prefer to see? You can only choose one, so choose wisely!