Holy Grail

The Holy Grail is a mystical artifact that first appeared in ProjectGodzillaβ. Taking the shape of a martini glass, it is actually the favored drinking glass of Cthulhu, who also claimed the Grail had powers untold.

The Holy Grail may appear in ProjectGodzilla X.

Episode 6
The Holy Grail is first mentioned by Cthulhu to the Usual Gang as an artifact that can grant untold power. Godzilla and his friends then decide to search for said Grail.

After a series of bizarre events, the Gang regroups and eventually find the Grail (which is apparently a martini glass) guarded by the great guardian of the Holy Grail. Lugia then quizzes them on what is behind them, which is Pyramid Head. The large creature then extends its arms and gives the entire gang a hug.

Episode 7
Destoroyah arrives to attempt to steal the Holy Grail, but Cthulhu intervenes, taking the Grail for himself while also revealing that "it is his favorite drinking glass" before flying away.

Episode 8
Cthulhu barges into the Restaurant of Ra in a drunken state with the Grail in hand.

Trivia

 * It is unclear as to why it was decided to have a martini glass as the Holy Grail.