Dancing for dinner

What am I in your courts, but under your spell? I will twist in your cauldron and jingle my bells! I will turn wheels and crack open day, kick out the sun's yolk and make meringue clouds, and when you roll away, still bleary-eyed and clasp-handed, I will spring away and fall back! I will whip like winter on your window. I will give you blossom snowshowers I will offer you starry daffodils I will hand you twinkling snowdrops but you only care for narcissi and hemlock. For want of a breadcrust smile, I will light the fuse on my brightest tricks and blow sky high.