I'm in Ireland and the divination games I remember are - Barm bracks used to contain at the least a ring, which would predict who was doing to get married next, and in one case also a stick, a rag, a bean - other things - predicting wealth, travel, can't remember.
There was also peeling an apple and throwing the peel over your shoulder to see the initial of the man you'd marry.
A more sinister game that scared my mother when she was little involved a blindfold and saucers filled with water and soil and other things I'm not sure of, and the one that the blindfolded one touched when they reached out their hand told what would happen to them in the next year - water meant travel overseas, soil meant DEATH!
All pleasantly frightening and not taken seriously (except by the very young).
So that's divination.
Necromancy afaik was limited to stories about ghosts who came back with clues to buried treasure.
Ghosts in the Irish tradition were usually less sinister and dangerous than the fairies who were very unpredictable, but associated with the start of summer on May 1st, the other end of the year from Hallowe'en at the start of winter.
We didn't have witches at all.
All fun, nuts and apples and other stuff, are being discussed on a thread on Craicnet.
And then, most people would go to church on All Saint's day, and would visit graves and pray for the dead at some stage on the first three days of November, and would give up booze 'for the holy souls' (and to get ready for Christmas) and have other memorialising during the month.
Not a bad way to start winter, and, in the past, a chance to rest after all the hard physical farm work during the harvest season, and to sit round the fire and tell stories.