Void Bulb is a Common Grenade found in Baldur's Gate 3.

""The numerous suction cups on this ball expand and constrict rhythmically, as if breathing - they latch on to anything they can get hold of."".

Where to Get Void Bulb in Baldur's Gate 3

This item is sold by Omeluum, a vendor located in the Myconid Colony. Additionally, it can also be found on the Nautiloid during the Prologue.