This is a cave spider xp grinder I built on smp5. I can't take credit for the design, but it was a pain in the posterior to build. Those suckers are fast!It can hold around 100 spiders in the hole, possibly more. The little darling keep trying to swim away from it. The lever triggers 2 pistons that are on a timer, that suffocates them until they are 1 hit kills. Below them is a hopper and a chest to catch all their goodies after I chop their ugly heads off.