triskelion or triskele sign icon outline black color in circle round flat style image

abstract ancient around asgard black body celtic circle circular coil color curve cycle cyclicality domination emblem harmony helheim helix icon illustration intercourse loki midgard motif odin ornament outline priest rotational round shaman sign soul spiral spirit swirl symbol thor three triad triangle trinity triple triskel triskele triskelion tryskel turning vector