Sometimes it’s not clear what or who needs to be banished.
There’s just a prevailing sense of evil that needs to be expelled. This spell is most effective during the Dark Moon. An
iron hammer is required, as is a flat rock, and either a coffin
nail or an old rusty nail.
Hammer the nail against the rock. The goal is not
to pierce the rock but merely to score it three
times across the face. Visualize what you are dispelling while you hammer.
Bury the stone far away.
Carry the nail in a red mojo bag, together with some crossroads’ and/or graveyard dirt.
(from The Element Encyclopedia of 5,000 Spells by Judika Illes)