Plague of Shadows
PoS Boss
Stage Tower of Fate: ????
Theme The Vital Vitriol
Weapon Bombs

The Plague of Shadows is the penultimate boss in the titular campaign, as a battle against himself.


The Plague of Shadows appears as a pitch black Plague Knight in his boss form from the other campaigns.


Spoiler warning!
This article contains plot details about an event that occurs later in the game.

The Plague of Shadows appears after Plague Knight has defeated the Enchantress and completed the Serum Supernus with her Essence. It is first revealed as the knight's shadowy outline cast on the stained-glass window. Lightning strikes and the shadow is separated from Plague Knight and projected behind him. It then starts moving on its own to fight Plague Knight. If ignored, it addresses Plague Knight on its belief that there is still hope for him.

Once defeated, the Plague of Shadows transforms into the Corrupted Essence.


The Plague of Shadows fights akin to Plague Knight in Shovel of Hope except that the arena is made entirely of rising destructible blocks. Another important note is that Plague Knight's bombs can destroy the vats which Shovel Knight could not do.

Alternatively, the Plague of Shadows can be defeated by remaining still for about 30-40 seconds, after which it speaks its line, ending the fight.


"????: You are steadfast in your resolve... Maybe there's hope for us yet..."


  • When the Plague of Shadows takes damage the color cycling reveals the detail on its cloak and mask normally invisible due to its all black palette.
  • This boss was possibly based off of a suggestion by twitter user Fireork recommending something similar to the X-Potion from The Candy Box 2.[1]
  • Although not clearly stated, this battle takes place in Plague Knight's mind.[2] It can be interpreted as as a mental test of his resolve by making him fight against himself.
    • This would also fit considering this fight might've also been based off of the infamous Dark Link battle in Zelda II: The Adventure of Link due to the very close resemblance to the battle and how it also was a test.



  1. Twitter post by Yacht Club Games
  2. Twitter post by Yacht Club Games
Plague of Shadows Characters
Main Characters: Plague KnightMonaBlack KnightShovel KnightThe Enchantress
The Order of No Quarter: King KnightSpecter KnightTreasure KnightMole KnightTinker KnightPolar KnightPropeller Knight
The Wandering Travelers: Shovel KnightReize SeatlanBazMr. HatPhantom Striker
Guest Characters: Madame Meeber
Potionarium: MagicistHedge PupilMail MinionPercyOolong
Armor Outpost: ChesterTroupple AcolyteLeoPeacock GentDollyAirship Enthusiast
Hall of Champions: Head GuardCultured FellowPatron
Other Characters: Troupple KingTroupplePlague of ShadowsCorrupted Essence