It is a thrown explosive device that creates a dome shaped damage zone on the field that endures for about 5 seconds while covering a significant portion of the field. Since I have to dramatically remove it from my cleavage and physically throw it, actually detonating it on impact in your face is something of a skillshot, but the space control is still incredibly beneficial.

It is also a skill shot when I circle around and just extendo-arm punch you back into it like I'm tucking you into for bed.