Threshold Magic
The power of boundaries and doorways as places of magical potential.
Thresholds, crossroads, and boundaries held special power in Celtic magic. Here the normal rules weakened, the Otherworld came near, and transformation became possible. Protection magic focused on thresholds; spirits could not cross properly warded doors.
At the threshold, anything can happen; guard your doors well.
Threshold focus shows Celtic awareness of boundary places as charged with power.
Folk Tradition