A little Mini Hakkero model I made, only 44 vertices, so I think this qualifies as low-poly.
> "The mini-Hakkero (ミニ八卦炉, "mini-Eight Trigram Furnace" or "mini-Elemental Furnace") is a magical device owned by Marisa Kirisame. As revealed in Curiosities of Lotus Asia, it was originally given to Marisa by Rinnosuke Morichika after she stopped living with her parents. The mini-Hakkero takes the shape of a hand-sized octagonal block of wood, with the eight Taoist trigrams inscribed in a circle around its center. The internal components were originally made of iron or steel, but replaced by the mythical hihi'irokane metal after rusting. It is capable of generating immense heat and magical energy--Rinnosuke describes it as capable of reducing a mountain to ashes. Marisa relies on it heavily for research and combat, most notably to power her Master Spark."
From: The Touhou Wiki