Phantom Hugs

Sparks

Placing the Bottle of Sparks on the ground makes it a new Light source which acts like a survival friendly version of the Light block

Becoming an Evil Evoker :>

Shift Clicking an Allay with a Bottle of Gloom Turnes it into a Vex

Crafting the Darkness Insignia

by collecting the gloom from the cauldron it becomes a ingredient in this crafting recipe

Turning Sparks to Gloom

by adding sparks to a cauldron which is over a soul campfire will turn it to gloom

Getting "Bottle of Sparks" from an Allay

Shift right click on a Allay with a Glass Bottle to get Bottle of Sparks