Egg

The Egg is the mission object retrieved in Polysemy, a step of the Wishing All the Best seasonal quest in Riven's Lair. The Guardian clears Vex in the lair, steps on three plates to open a portal, and advances to the Pavilion, a Vex-occupied area.

The Egg is retrieved only after the Aspirational Construct guarding the Pavilion is defeated. Its shield must first be broken with Arc Craniums, which Arc-Charged Minotaurs drop. The Guardian then transmats the Egg to Riven.