Sandbox

From Ben 10 Planet, the wiki resource for Ben 10!

Sandbox is a Graneoid from Silicrone. Sandbox is apparently a "nonfavorite" alien, as Ken expressed distaste for it. From his name, his powers are sand-based. he's power are just like sand-man.

Silicon-based microbial lifeforms with hivemind intellect similar to the Hunter in Halo.

Here is link to a fan based drawing of Sandbox by kjmarch