Dream Orb

From the Super Mario Wiki
The Dream Orbs being absorb into the Dream Stone.

Dream Orbs are power sources for the Dream Stone found in the game Mario & Luigi: Dream Team. When Mario and Luigi reach the summit of Mount Pajamaja, they see Bowser, Antasma, Kamek and their royal guards with four speakers. The speakers unleash the Dreambeats, a music which makes everyone on the island fall asleep. Meanwhile, the Bros. quickly jump into the Dream World to avoid the same fate. Dream Orbs, orbs created by those who sleep, are absorbed into the Dream Stone to power it and allow Bowser and Antasma to cast their wishes.