Modern simplified shape — heavily reduced from the traditional
釁 which showed
爨 (the stove / cooking element) over
酉 (wine-jar) plus
分 — together: sacrificial wine being poured and split apart on a vessel's seams. The simplified form keeps only a faint silhouette of that ritual scene. Indexed under Kangxi #143
血 (blood) by tradition; the radical isn't visibly present in the modern simplified glyph.