What were ancient pagan celtics like?

Answer 1

We know very little about how the ancient Celts worshipped. Each Celtic society seems to have had its own pantheon, and their were many local deities who were not worshipped universally even within a society. On the other hand, there were a handful of deities worshipped in more than one such society who had similar names and functions - Lugh, Brigid and Ogma being examples. In addition, the various Celtic mythologies tended to resemble one another in their basic themes. We know almost nothing about ancient Celtic rituals except that they were probably presided over by druids. Mistletoe reportedly figured in at least one Celtic rite. The ancient Celts may or may not have practiced human sacrifice; there is controversy on the subject. However, there is archeological evidence of animal sacrifice. A complete picture of how the ancient Celts lived requires extended study and is beyond the scope of this answer.