Earthlock: Festival of Magic

Mushigra is located in the scroll roads in the bottom left corner, opposite where you fight the boss. It is a very large mushroom, you should be about level 9 or 10 thje first time you come through here. Don't bother fighting it until you are level 13. He begins to spawn in extra mushroom enemies when he is 80% HP, and then begins to counter physical attacks by spawning mushrooms.

Strategy
Once you're level 13 or so try and make sure you either have your super or are close. I made sure Amon and Taika were not bonded to eachother. Mushigra is weak to fire so use fire attacks on it until you bring it's HP down to less than 80%, at this point Mushigra will begin spawning mushrooms. When these come out use Super Blaster - Fire Blast to do big fire damage and burn all of the adds. This should one shot them. If Amon's super runs out before this is done then super Taika and use Taika's Fire Breath to hold the adds at bay while putting down big damage. As long as Gnant is keeping up regens then this fight should be cake
Reward
For beating Mushirga you get a few Talents and the Mushigra talent which makes 'Cure' take less time and also reduces burning/electrocute/poison/drowning damage by 25%

You don't have to be a high level to defeat Mushriga. Of course, anything is easier when you grind out that exp. I defeated him/her/it at level 9 and 10s by being tactical on my second try, though it was a close battle. If you want to defeat them that early to reap the rewards, I say go for it!

Here is the video of me doing so:

Here is what you need to know:
-Make sure you have plenty of ammo for everybody (20x each arrow, then I had 100x normal bullets for Amon).
-Switch to their ranged stances prior to battle, and only stick to ranged attacks. Otherwise Mushiga will counter you by spawning more shrooms.
-Always focus on the mini shrooms that get pooped out until he is down to 25% health. Then he will spawn three or four at a time! Before he does this (hopefully you know when its coming up, as I waited until after he spawned 3 of them) you should just strictly target him until you kill him.
-Then when the battle is you against 6 or 7 shrooms, focus on the weakest one first. The poison stacks will be rough, each poison stack deals about 100 damage to you. If there is 5, then you will be dealt 500 damage whenever you take a turn.
-With Hogbunny focus on healing, resurrecting, and curing (obviously), but sometimes don't worry about using his spells just go straight to the potions. Same goes for Taika, if you can't fireblast, focus on healing with potions.
-Resurrect people as soon as they go down, cure them if they have many stacks of poison (if in danger of dying).
-As always, watch who has the next turns and who should have priority in being healed/cured/killed.

Hey everyone, just a quick video showing how to get this achievement. For this achievement, you need to defeat the optional boss Mushriga in the Scrollroads area. It's a giant mushroom, and it's located in the Southeast of the dungeon( It forks when you go south, and it's the east path). You do need to beat him for the Bestiary achievement as well as to get the Poison plant for the planter achievement. Biggest thing with this boss, use ranged! When it is hit with melee it spawns another mob to kill(up to six). If you use range and magic it won't spawn anything. It's also weak to fire so use that. Should go down quick if your about level 12-13. Hope the video helps, good luck!