added new multiblock (siege stone)
to build see bellow--


layer 1
G G G
G M G
G G G

layer 2
X R X
R N R
X R X

G = gold block
M = mossy cobblestone
R = redstone torch
N = netherrack
X = air

be sure to place the netherrack very last for this to work!

a seige stone will start an event for 120 seconds (2 minutes) this can be configured as well in the config, during this event siege zombies will spawn at random in a 30 block radius of the multiblock center siege zombies are 2x faster than normal zombies and hit harder as well as not burning in sunlight

once event has lived for the full time the netherrack block will be removed and no more siege zombies will spawn

multiblock is fully inspired by the OG herobrine altar