Harder Farther Grim Citadels

The Grim Citadels modification can be used as a standalone project or combined with the core Harder Farther Core module for extended functionality.
Grim Citadels are unique towers filled with hostile mobs, valuable loot, and unexpected surprises. These structures cast a sinister curse on the surrounding territories, creating a dangerous zone around them.
The only way to destroy these threatening structures is to venture inside, locate the mysterious Grim Heart, and destroy it.
When used together with Harder Farther Core, enemies inside the citadels become significantly more dangerous: they gain enhanced durability, deal more serious damage, move at increased speed, and possess improved stability.