If you need a spell to let the BBEG wizard track the party, here's a way to do it that doesn't require a crystal ball or other scrying device. It doesn't require summoning a dangerous creature and risking it attacking you. Send a powerful ally or minion after the party.
Webcomic Unsounded
Sky Burial My Blog Post about types of burial.
Goblin Punch: The Ruined City of Braxa / Undead Armies
See the companion blog post here.
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