Player spawned mini bosses through map drop similar to end game bosses

As the title suggests, would it be worth exploring allowing players to craft or hunt for mini boss spawn items that can be dropped in specific locations on the mini boss maps?

I.e. for Mushmom you would need to craft "Potent Spore" made up of 1 mushmom spore, some mesos and some variety of items, crafter by some person?

Then the player would drop this "Potent Spore" infront of the door of the mushroom house in the mushmom map.

This player spawned variant would be a stronger, more health, damage and spawns relevant mobs. for example a stronger Mushmom could:
spawn:
- shrooms at any point
- Orange Mushrooms at 80% health or lower
- Blue Mushrooms at 60% health or lower
- Green/horny mushrooms after. Etc. Etc.

Zombie Mushmom could spawn all kinds of undead monsters.
And you can go on.

These variants might also drop special items required for later game gear, or maybe fractions of other things required to craft more advanced items?

Would be cool to catch a break from grinding some times when your maple buddies are online to do a "mushmom raid"

 

Definitely wouldn't make it something that could build up to something op.
Potential parts of the game it could tie into:
- It could be part of the HP challenges, or drop some kind of item that can be used to craft something related to HP/Mana.
- Drops Crafting Items (ores etc), NX Coupons, Gatcha's? there's lots of things it could play into
- Or just a more HP/XP/Drops in general?

As long as the investment is balanced with the reward .