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.
Behavior
It inherits IM Zombie combat, targeting, mining and Nexus pathing. Its outer skin renders translucently. On death it creates a random wave mob, sometimes with random compatible armor or a weapon. Nexus destruction suppresses that release.

Death release and Versus team assignment
When killed on the server, a Mystery Zombie attempts one random eligible IM wave-mob release at its death position. The replacement is selected from purchasable IM combat options permitted by the current wave-spawn rules, not from every entity in Minecraft. Creation can fail, so this is not a guaranteed extra creature in every environment. The dead Mystery Zombie itself does not switch teams.
| Original binding | Released mob’s Nexus |
|---|---|
| Versus, with an opposing Nexus | One fair coin flip: 50% original Nexus, 50% selected opposing Nexus. |
| Versus, with no opposing Nexus | Original Nexus; no opponent coin flip. |
| Normal invasion or unbound | Original binding, including remaining unbound when there was none. |
The release inherits the death position and motion. Where supported, it also carries the original mob-cap participation flag. Each compatible armor slot independently has a 50% chance of receiving a random valid item; a compatible main-hand weapon has a separate 50% chance. Only usable registered equipment is selected. These equipment rolls are separate from the team coin flip and can leave the replacement partly or entirely unequipped.
Nexus cleanup removes invaders without their normal death release. The replacement is a death effect, not an item drop, and it does not change the normal loot description.
Verified against Minecraft 26.3 / NeoForge. Compare Builder gravestone summons, which retain their Builder’s Nexus rather than using this 50% opponent rule.
Drops
See IM display names. Use the registry IDs listed in the mob guides.
Uses its inherited Zombie loot behavior. The released mob is an additional death effect rather than loot.
Vanilla replacement
It is a rare wave-selected variant and has no dedicated registered spawn egg; the shown Zombie egg represents its shared family. See the Spawn Egg Reference.
