This guide shows you how to complete the daily mission Defeat Mushmom at Stranger’s House 3 times.
Stranger’s House is a hidden map which is located in Henesys. Therefore, the first step in completing this mission is getting to Henesys.
Once you are in Henesys, head on up to the top-left
When reaching Stranger’s House, jump down to the lowest platform where you will find Mushmom. If the boss isn’t there, simply change channel until you find it.
Defeat Mushmom 3 times and you will have cleared the mission. You will easily be able to solo the boss.
Below is a video-version of this guide