How to join
Ten minutes, once. You only need the game and Undead Legacy: the DanZell mods run on the server.
Switch the game to 2.6
Steam → Library → right-click 7 Days to Die → Properties → Game Versions & Betas → choose v2.6.
Download Undead Legacy 2.7.40
Get it from the official site, ul.subquake.com. It comes in two parts.
Install it
Extract both parts into the Mods folder of the game. Create the Mods folder if it does not exist.
Start without EAC
Launch the game with Easy Anti-Cheat turned off, as Undead Legacy requires.
Find DanZell
In the server browser search for DanZell or Undead Legacy and join.
Playing in Italian?
An Italian translation of Undead Legacy is available on Nexus. Copy it into Mods\UndeadLegacy\Config\Localization and set the game language to Italian.
Stuck?
Most join errors come from a different game or Undead Legacy version. Check both first: game 2.6, Undead Legacy 2.7.40.