Treasure

Treasure is a term used to reference both Elemental Crystals and Equipment in The Metronomicon.

Treasure may be obtained by killing enemies, beating sidequests, arena challenges, or killing minibosses.

Enemy Drop Tables
There are two stages to determining what and if treasure drops from an enemy's defeat.

First, a die is cast to see if the enemy will drop any treasure at all:
 * By default, enemies have a 60% chance to drop treasure.
 * Enemies which killed after the Miniboss or  Boss have a bonus 20% to drop treasure.
 * Enemies afflicted by Motherlode or Broken Compass get further bonus chances to drop treasure.

If treasure is determined to drop, that enemy's Drop Table is inspected:
 * All enemies have some amount of Elemental Crystals, determined by their Elemental Type,  Miniboss /  Boss Status, and the  dungeon they spawn in.
 * All enemies may additionally have zero-or-more pieces of Equipment. Every piece of enemy-dropped equipment can only come from one unique enemy.
 * Each specific piece of equipment, and the elemental creds, have a specific drop rate from this enemy. Those rates all add up to 100%.
 * All like-species enemies in the same dungeon have the same drop table.

Then, a second die is cast. The die is compared against the drop-rate of each item in this Drop Table to determine what will drop:
 * Once a piece of equipment is already obtained, it cannot drop again.
 * An already-dropped piece of equipment's chances are distributed out to any other equipment evenly, but not to the Creds, making further rare gear drops more likely as previous equipment has already been discovered.
 * Enemies afflicted by Shakedown have a greater chance to drop equipment, over crystals.

Finally, if Elemental Crystals drop, the number of crystals can vary by 25% up or down from the drop table's listed value.