Penance egg

A Penance egg is used to colour a whip white in the rewards of Barbarian Assault. This is proven from the examine text: A weapon from the abyss painted white from the yolk of a penance egg. This could kind of be considered an item, even though it is unobtainable, and can never be seen.

Penance eggs would come from the queen even though you can never see it laying eggs.

There are also eggs when you are playing the mini-game. When you are playing the game, the collecter will be able to pick up 3 colored eggs depending on what the call of the attacker is. The colour of the eggs are; Red, Blue, and Green. There is also yellow eggs, which the queen lays. These eggs are used to fire at the penance enemies using the cannon. Red is a explosive egg, Blue stuns the target, and Green poisons the target. Yellow eggs are used to make Omega eggs to fire at the Penance Queen.