Improvement MonsterSpawn_group allow add effect type on monsters invasions

Hello devs,

I would like to ask you for the ability to set some kind of buff or some special effect to monsters defined as raids in the MonsterSpawn_group system
It is natural for us Administrators to creating invasions with existing monsters, for example:

• ice queen
• gorgon
• hydra

And many other monsters in the system, but it turns out that these monsters can become camouflaged when an invasion is started the idea would be to add the possibility of being able to define some kind of effect to the monsters such as the news system that applies an aura around the monsters and does not allow the monster to take damage.

It would be something based on these types of effects, it would be a great differentiator for all of us.