I think there was a game between Kobra and Bugor in the Winter Cup, where Kobra spent 2 months jumping away from Bugor with Dimension Door. In the end, he dug up the grail, placed it in the swamp, and managed to hold the defense thanks to it.
So they do dig :)
And how many games total are there where they dig up the grail?:) As a percentage of the General number of games... 0,000...1%))?
The general duration of the game was 4.1.1 I think :).