Zeus's Beacon is a magical key that calls out to the three shards of the Scythe of Tartarus when activated.
History[]
In ancient times, Zeus left the beacon on Earth in case the shard ever needed to be reassembled.
At an unknown time, the key somehow ended up in Marisol Vera's possession along with a shard of the scythe. Before the birth of her first daughter, Macy Vaughn, Marisol used to wear the key around her neck, but at some point after, she hid the key in a pillar on the porch of the Vera Manor. Macy found it with the help of the psychic, Mama Roz, in "Kappa Spirit".
In "Out of Scythe", Macy accidentally activated the key, causing the shards to call out to each other and alerting demons to the scythe. When the Charmed Ones found a shard in their house, the key automatically attached itself and became one with the shard.
In "You're Dead to Me", it was revealed that Marisol had previously activated the beacon in order to assemble the scythe, so that she could release a Necromancer named Knansie from Tartarus to resurrect the stillborn Macy.