衅 is a simplified Chinese hanzi, listed here under the keyword “consecrate sacrificial vessels by smearing blood”. It is built from 血 (blood) and 半 (half).
On KumiJi Glyph Explorer, open the parts search and type “blood” + “half”. 衅 is among the results, together with every other character containing the same shapes.
Open 衅 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.