Preventer and Hardened Slime Balls

Hardened Slime balls are created with 1 slime ball and 1 gunpowder.  They can be thrown and leave a glop of slime(glops of slime are also left by slimes when they move).  Glops of slime prevent a mob or player from moving for 10 until wacked at to get rid of it.  When wacked, they drop 1 slime ball.  

The Preventer is an Illager that can be found in swamp biomes harvesting slime globs, or in raids.  Preventers throw hardened slime balls at players and villagers who are within 4 or more blocks away, but uses a stone sword against players or villagers who are closer.  Preventers drop 0-3 hardened slime balls and 0-4 regular slime balls as well as a bundle.  Preventers will also throw hardened slime balls at witches but won't charge them with the sword.