Obsidian Staff

The Obsidian Staff is a craftable Pre-Hardmode magic weapon. When used, it will charge up through 3 different stages:
 * The first stage consists of small obsidian pebbles, which grow in numbers the more the use button is held.
 * The second stage fires a large obsidian boulder.
 * The final stage automatically releases a powerful fiery boulder which inflicts the On Fire! debuff.