about 2 years ago - Crater Creator - Direct link
admos is correct, although tougher zombies would have to fall even farther than ~20 blocks to maximize their fall damage. The damage cap means you’d want to plan for what happens after they fall. You may actually want to provide them an escape route, so they don’t beat on the tower’s pillars instead.

https://steamcommunity.com/sharedfiles/filedetails/?id=2858592286

For what it’s worth, what you describe is somewhat similar to this base I made, except I didn’t make a bridge. The zombies had no choice but to fall in (the wooden frames are retracted), and then they had to climb long, winding staircases built onto the outside of the tower to get up to me.

Digging out the pit was a task, for sure. I ran tests and plotted it out on graph paper to use the minimum amount of dynamite. The fun part about that is, you can dig out the perimeter first, and then stand in the remaining center. On horde night, the zombies will jump in and do some of the rest of the digging for you.