Calamity's Vanities/Geminga

Geminga is an Expert Mode-exclusive pet summoning item obtained from the Treasure Bag dropped by Astrum Deus. It summons a swarm of 11 small Astrum Deus worms, with one being slightly larger to follow the player.

Trivia

 * Geminga is one of the smallest known stars.
 * The item was previously known as "Astral Star", but was changed for being too generic.
 * The item's summoning of 10 small worms and 1 large one is a reference to how the Astrum Deus fight previously worked.
 * The buff's tooltip mentions "Wormheck", a reference to the long deleted #worm-hell channel in the Official Calamity Discord