Nightmare Guardian

The Nightmare Guardian is a post-Moon Lord enemy summoned by Abaddon, the Source of the Affliction. It will fly across the screen horizontally and attempt to ram the player.

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Characters:

Hardmode Enemies
Surface	Gold Slime
Desert	Primordial Thrall
Empress' Den	Nest Warden • Spiderling • Venom Stalker
Underworld	Acid Cauldron

Post Moon-Lord Enemies
Flame Razed Forest	Furious Slime • Furia • Festive Furia • Flaming Spirit • Winged Furia • Eroded Winged Furia • Eroded Flaming Spirit
Scorched Sands	Blazing Shrub • Draconic Crusher • Furia • Winged Furia
Underground Crimson	Eroded Ichor Sticker
Underground Corruption	Eroded Corruptor
Space	Eroded Harpy
Underground Desert	Eroded Lamia
Underground	Eroded Tunneler
Surface	Dark Lancer • Silent Observer • Nebula Slime • Nightmare Spirit • Phantom Stalker • Quasar Slime • Solar Slime • Stardust Slime • Vortex Slime

Event Enemies
Blizzard	Frigid Jellyfish • Frigid Slime • Frigid Spirit
Piglin Army	Blaze • Chicken Jockey • Zombie Piglin • Zombie Piglin Crossbower

Bosses
Pre-Hardmode	The Decree • The Flaming Pumpkin (Dread Core) • Jensen, the Grand Harpy
Hardmode	Araneas • Harpy Queen, Raynare (Royal Harpy • Yofaress) • Primordia
Post-Moon Lord	Abaddon, the Source of the Affliction (Nightmare Guardian • Nightmare Spirit) • File:Map Icon Araghur, the Flare Serpent.png Araghur, the Flare Serpent • The Lost Siblings • Erazor • Nihilus