A drawing that I have done on page 6 in my Daler-Rowney A4 Optima Spiral Pad.
The overall idea of the rocky fire is inspired by the Lava Reef Zone Act 1 level, however the fine details of the molten magma is inspired by the finely detailed foliage ground in the Mushroom Hill Zone level, both from the Sonic The Hedgehog 3 & Knuckles (SEGA Genesis/Mega Drive) video game.
The lazer gun is inspired by the Railgun weapon from the Grand Theft Auto V (Microsoft Windows/Microsoft Xbox One/Sony PlayStation 4) video game.
BIC blue médium biro pen on cartridge paper.
Super special thanks to colleagues at one of my previous jobs, for kindly giving me the Daler-Rowney A4 Optima Spiral Pad, along with some Derwent Academy Watercolour Pencils, as birthday gifts. :-D