You can create a 3cm solid marble that you can throw (or rather should throw). 3s after its creation, the marble immobilizes itself and expands into a 3m ethereal sphere, lasting for 3s before disappearing. Any matter that was inside or enters that sphere disappears forever. The sphere doesn't have a gravity of its own and therefore doesn't suck in matter like black holes do but air or water rushing in can provide mild or excellent suction. You can create up to 3 spheres within a 3min period.