The Zombie Boss protection window is the one mechanic in Last War that players routinely destroy with their own good manners.
Ten minutes, until you tell anyone
After you discover a Zombie Boss it stays protected for you for 10 minutes. Then comes the rule: sharing it in the World Channel removes the protection. Post the link so your alliance can find it, and you have also just handed it to everyone else on the server, immediately.
Share it in alliance chat instead. The boss is designed for rally battles — First Fun says so directly — so you do need help; you just do not need the whole world.
Two rewards, and you can end up with either one
| What happened | What you get |
|---|---|
| You discovered it and killed it | Kill Reward and Discoverer Reward |
| You killed someone else's boss | Kill Reward only |
| Someone else killed yours, and you were not on the attack team | Discoverer Reward only |
Rewards arrive in your mailbox, not as a pop-up on the map, which is why people think they received nothing.
The two Profession Skills, and which one is a trap
- [Battlefield Cleanup] does not affect Invading Zombies. It works on regular world map zombies — Ironhead, Glutton, Miser and Doom Elites — and that is all.
- [Monster Tracking] is effective against Zombie Bosses. If you want to find them rather than stumble across them, this is the skill that does it.
There is also an event trap: zombies from Zombie Invasion do not count toward the Overlord Growth Boost event. If you are farming for that event, the invasion is the wrong target no matter how convenient it is.
Finding one at all
Defeating Invading Zombies carries a chance to spawn a Zombie Boss. So the loop is: clear invading zombies with [Monster Tracking] active, and rally whatever you turn up — with your alliance, in alliance chat, before the ten minutes are gone.
Sources: First Fun’s official English help centre — How long is the Zombie Boss protected?, Rewards for killing the Zombie Boss, How do I claim my rewards?, Does [Battlefield Cleanup] affect Invading Zombies?, Does [Monster Tracking] work on Zombie Bosses?, Do invasion zombies count for Overlord Growth Boost?, The Zombie Boss is too strong, How can I find a Zombie Boss?