Modifiers

Bosses and levels can have modifiers that change aspects of gameplay.

Boss

Bosses can appear with 0-4 modifiers.

Name	Description
Burning	Boss has a fiery aura that damages the player if they get too close.
Champion	Boss HP is increased by 50%.
Cloned	Two of the boss spawn. Both must be killed and they have less health.
Crazed	Boss acts faster. Boss limited to one special attack. [verification needed • edit • ?]
Dwarf	Boss has a smaller model and moves faster.
Electric	Boss has an electric field surrounding them, lightning bolts constantly fall from the sky. Their strike point is marked with a white dot on the ground.
Giant	Boss is physically bigger and has double HP
Hidden	Boss is translucent, but has a waves visual effect around them. Has 25% less HP.
Lethal	Deals more damage. Uses special attacks much more frequently.
Poisonous	Attacks inflict damage over time.
Vengeful	Boss shoots projectiles back at you when you damage them.

Level

Levels can appear with a single modifier or none.

Name	Description
Barren	Enemies do not drop coins and reward chests do not spawn.
Castle	The level has a unique vertical room with a Cutthroat that fires beams at the player and a weapon box. Guardian and clockwork enemies are more likely to spawn.
Dark	The level is darker and the player must navigate with a flashlight.
Explosive	All enemies drop skulls upon death, which can be touched to cause an explosion that damages nearby enemies. Enemies won't drop keys or gold.
Frozen	The whole level is ice causing the player to slide about.
Glass	The player and enemies take double damage. Floor texture changes to look more brittle.
Infested	Rooms have more enemies.
Inverted	The player camera is flipped vertically and controls are inverted. Can only occur on Asgard. [verification needed • edit • ?]
Midas	Every enemy drops a coin. Keys and potions are replaced by coins. Mini-bosses and bosses drops multiple coins instead of a key.
Pitted	The level has a unique room, where you have to complete a (simple) jumping puzzle in order to exit.
Retro	Your screen becomes highly pixelated, and your weapon model centers on the screen like in DOOM. Note: this modifier is Challenge specific and does not occur in normal runs.
Space	Gravity is reduced. Doubles the effect of recoil, allowing flight by successively shooting downwards.