New grenade types

hm..I was thinking about a new grenade type , like something that if hits, bounces (solo) or explodes like shrapnel and may hilt (multiple targets) at once within a given range.

that or maybe the kind of sticky nades that explode after a certain time, or explode when re detonated.

or maybe invisible mines that dont have many polygons or whatever, like the 3d model is either approaching transparency or could somehow camoflauge with the background? and they go off either after time, remote, or by pressing but each one has its own time variant of how it explodes..for example, it maybe would be OP to have it instantaneous go off if its a press, but they could also do less damage. and the time delay could be louder do more damage. remote would be middle of the spectrum? maybe?