GitLab

dungeon-desert_temple-tribal_minion:
  Type: VINDICATOR
  Display: '&eTribal Minion'
  Health: 25
  AITargetSelectors:
  - 0 clear
  - 1 players
  AIGoalSelectors:
  - 0 clear
  - 1 meleeattack
  - 2 movetowardstarget
  - 3 randomstroll
  Skills:
  - model{mid=tribal_minion;n=false;d=false;radius=45;h=false} @Self ~onSpawn
  - CancelEvent{sync=true} @self ~onAttack 
  - remove @self ~onTimer:60 ?!playerwithin{d=50}
  Options:
    ResetPlayers: true
    Silent: true
    FollowRange: 30
    MovementSpeed: 0.32
    PreventOtherDrops: true
    Despawn: false
    KnockbackResistance: 1

desert:
  MobType: dungeon-desert_temple-tribal_minion
  Worlds: world
  Chance: 1.0
  Priority: 1
  Cooldown: 1
  Action: REPLACE
  Conditions:
  - mobsInRadius{t=dungeon-desert_temple-tribal_minion;r=50;a=<8} true

Here is just a random mob I have, put this in a randomspawn let it do its thing, eventually you will encounter a mob that is not there but the model is.

https://cdn.discordapp.com/attachments/1130565659286306928/1168561968391651448/modelengine4.mp4?ex=65523724&is=653fc224&hm=d86113d23f2c2e3a9a889ab58f73bf5dc88ac55976177ffa699c0c1e96b819e0& Here's a video of it

This doesn't happen if Despawn is set to true in mob options, however I also notice sometimes I'll encounter a ghost model and when I look around I'll see that the mob was actually behind a wall and when I see that mob and turn around the ghost model is gone, it's like it teleported into place. For the case of a mob being removed though it is perma stuck there for the client