Ominous Bubble

The Ominous Bubble summons Bubble Man in Hard Mode. You can buy the Ominous Bubble from the mermaid or you can craft it.

Crafting
Crafted at a Demon/Crimson altar.
 * 20 Souls of Sight
 * 20 Souls of Night
 * 50 Demonite/Crimtane Ore