May or may not be related to the Bloody Grail.
See also - the Affair of the False Grail.
The cup borne by Maldred’s consort was not the Grail, but it was an artefact of considerable power. It was lost when Maldred, his consort, and much of the population of Mousillon died in the Red Pox of 1322 (2300). If it were to fall into the hands of someone unscrupulous, such as the Black Knight currently claiming to be the rightful Duke of Mousillon, it would be very dangerous.[1a]