item that invokes monster that helps the player

[Tassadar]

Friends wanted to know if it exists in the emulator R-athena or in some npc custom some system where the player invokes a monster and this monster attacks the mobs of the game. Dividing XP with the monster invoked. I need an item, or several items where the player clicks twice and a monster is summoned for x minutes, and fight together as a player.

In the game as I recall it has the pets, which can be enabled to help the player, mercenaries, hums and plants of the alchemists. What I want is something different:

Usable item that invokes a fabre for example, not only the default mobs pets .. but any monster, and the monster helps the player to kill the mobs alone, for x minutes, without the player controlling itself, as if it were an escort of the Bosses.

If this exists on the server, please tell me why I need this much.
If it does not exist, contact me so we can do it together. Of course I will pay for the service.
Thanks.