Combat profile
For Minecraft 26.3 / NeoForge, wave base values and supported behavior can be changed per registry entry: see health, damage and base armor and mob abilities. Tier, size and wave scaling still apply.
Default values for Minecraft 26.3 / NeoForge. Server configuration and wave scaling can change combat values and abilities.
Behavior
Shares the Pigman Engineer’s siege AI: attacks the Nexus and nearby players, mines blocking terrain, bridges gaps and builds ladder towers. Default abilities include mining, bridging, towering, engineer towers and spiral staircases, with Oak Planks as building material. These remain subject to server configuration and terrain-building rules.
It can start holding a ladder, iron pickaxe or Engineer Hammer, switches tools while working and can pick up better armor. Unlike the living Engineer, its default fireproof setting is enabled; ordinary wall climbing and high jumping are disabled.
Spawning and waves
Entity: invmod:zombified_engineer. Creative spawn egg: invmod:zombified_engineer_spawn_egg. It can spawn directly in waves without a living Engineer converting first. It is active and non-boss by default, costs 6 (the living Engineer costs 5), and participates in SWARM, ARMORED, NETHER, SIEGE, MIXED, RANDOM, RANDOMHELL and UNDEAD themes. Selection depends on configuration, wave planning and valid spawn positions. See Waves.
Zombification
A living Pigman Engineer converts after roughly 15 seconds in an environment where piglins zombify, provided its AI is enabled and conversion is allowed. The timer resets outside those conditions. Other mods can veto conversion.
overworld-piglin-conversion=off in the running server’s config/invasion_config.cfg blocks this conversion in the Overworld; it does not override other dimensions’ normal environmental rules. The default is on.
The converted Engineer retains its attributes, current health, equipment, Nexus binding, mob-cap participation, target and persistent data, and receives Nausea for ten seconds. Conversion does not heal it or reroll its attributes. The zombified variant does not run the living Engineer’s conversion timer.
For descending spiral staircases, shared tower reuse and repair, see advanced terrain construction. These behaviors depend on the entity's configured abilities and server building rules.
For current Minecraft 26.3 / NeoForge block mining and construction clearance, this Builder uses a 1× digging multiplier. The held tool, Efficiency, Haste, Mining Fatigue and water/air conditions determine the actual rate; construction headroom is cleared through the same timed process.
Drops
On death it adds one Rotten Flesh as its guaranteed Engineer bonus drop, instead of the living Engineer’s Leather/Porkchop roll. This bonus is separate from ordinary equipment or other loot.
Rotten Flesh • 1 bonus itemSee the family conversion rules and registered spawn eggs.