Mass Monster Slaughter Sidequest has these relationships to other tropes:

parents kids shares a parent with:
Fake Longevity
parent child
Fake LongevitySpace Filling Path
''Overly Long Fighting Animation
''Forced Level Grinding
''Unskippable Cutscene
SidequestTwenty Bear Asses
Fake LongevityBack Tracking
''The Maze
''Marathon Level
''Missing Secret
''The Wandering You
''Talk To Everyone
SidequestFetch Quest
''Sidequest Sidestory
''That One Sidequest
''Bonus Dungeon
''Bonus Boss
''Escort Mission
''Collection Sidequest
''Cartography Sidequest
''Romance Sidequest
''Gladiator Subquest
''Irrelevant Sidequest
''Loads And Loads Of Sidequests
You'll need to Get Known if you want to add or modify these relationships.