Creature invisible/visible at accepting Quest

So I want to make a Creature invisible and another creature visible after taking a quest. Can anyone tell me how?

btw. am working on master build.

Be aware this may can be confusing for other players if a creature isn’t available.

And looking to the smartscript wiki page https://trinitycore.atlassian.net/wiki/spaces/tc/pages/2130108/smart+scripts the event On Target Quest Accepted isn’t implemented yet.

So the event “On Target Quest Accepted” is implemented. It’s the SMART_EVENT_ACCEPTED_QUEST (Value: 19), but this isn’t really interesting me. I just want to know how you make a creature in-/visible when you have a quest.

Just some ideas:

[ul][li]Spawn/despawn[/li]
[li]Change phase mask[/li]
[li]Change the the type_flags and make him a ghost.[/li]
[/ul]