In essence, this would be exactly what it's called in the title. It would be a stickybomb launcher.
The bombs would be like proximity mines, they would explode on contact with a player. They could be detonated all at once with a binded key and might be capable of sticking to vehicles.
I posted this because Blockland's closest thing to a stickybomb was JD's Explosive Kunai. Other than that, Blockland never really had a stickybomb launcher. I just thought this might be useful to some.