Calamity's Vanities/Ionized Jelly Crystal

The Ionized Jelly Crystal is a craftable Expert Mode-exclusive pet summoning item. It summons a pet Goozma, which initially starts alone, but gains up to four orbiting slime deities at a time given certain conditions. If the player enters a biome which has a corresponding slime deity, Goozma will gain a slime deity which will orbit around it. The appearance of these deities is affected by biome, and one will change to match the biome the player is currently in. Once Goozma has amassed four deities, the earliest deity summoned will be overridden by the next biome the player enters. If the world is experiencing a Blood Moon, Frost Moon, Pumpkin Moon, Solar Eclipse, pr Boss Rush, all four deities will transform into their respective event's forms and will not change again until the event is over.

Forms
A list of the forms the orbiting deities can take and their conditions can be found here:

Trivia

 * The Goozma pet is based on the Goozma boss from the now dead Emphatic Untamed Calamity mod.
 * The pet was coded by Seraph, the creator of said mod.
 * The item's recipe heavily borrows from the Gelatinous Amalgamation, the item used to summon Goozma.
 * The item's tooltip references the cancellation of Emphatic Untamed Calamity, as well as the Tragedy of Darth Plagueis the Wise.
 * The slightly higher drop chance given to the Astral, Crimulan Blight, and Ebonian Blight Slimes are a reference to Goozma's fight containing Astral, Crimulan, and Ebonian Deities.
 * The item has by far the longest tooltip of any item in the mod.