are mob droppers allowed? basically its a machine that drops mobs without needing a spawner. the mobs fall and die and u can collect the items. Thanks for reading this!

P.S. there are no mods on atm.

 but the mobs will dissapear in 3 mins so idk if it will work r not but good idea

its not really a grinder. they spawn inside the thing and they drop 40 blocks down to their doom. u dont get any exp so i wouldnt call it a grinder... but anyways look up how to make one on youtube.

That's the exact same as a so called 'grinder', but without the water and lava taking health from them, involving the lava and water reduces the time you need to put in to making a large drop.

The mobs die either way and yeah, you do get xp from them unless they've been nerfed for some odd reason. They're allowed non-the-less, but they're pointless if you're planning to go afk for a short time to let them spawn.