Merry May Day One And All!

A Riddle

I am born on May Morning by sticks, bells, and ribbons
I am the sap in the dark root
I am the dancer with his six fools
I am the tump behind the old church
I am the lost soul under the misericord
I am the oak against the stars
I am the face that peers through the leaves
I am the fear in a childs mind
I am the demon on the roof-boss
I am killed in October and laid on church altars
I am the guiser on the bright bonfire
I am the old grain sown with the seed
I am the flame in the pumpkins grin
I am the spirit in the kern-baby’s bosom