a clock that works after you log out
Ok tennis layel please make redstone not suck.
Before I do any work on this though it might be sensible to wait for the witch farm to be made first. If that has a decent gunpowder drop rate then there's little need to make a big mob grinder really.
They specifically ignore creepers and attack other hostiles.well spiders wont spawn in the first place, and do iron golems specifically attack zombies and skellies?