Just dice, apparently. Perhaps they thought that leaving something to chance risked interference from the Devil, whilst games of skill were OK. This is just a guess, though.

Those 7th century bishops were full of imaginative ideas. Canon 11 provided that no priest might take a bath with a Jew; taking baths with anybody not a Jew seems to have been acceptable! By Canon 61 if you consulted fortune-tellers or "showed bears or other animals to deceive the simple" then six years of Penitence was your reward. Canon 62 prohibited all transvestites and all dances by women. Canon 91 said that all abortionists and their clients should be punished in the same way as murderers.

I think the one I would have found most aggravating, however, was Canon 65 by virtue of which it was forbidden to dance round bonfires at the new moon. But that's the only time the urge ever comes on me! It must have been a fun Synod to be at.