Demon Fortress

Born from nothing into an empty living dungeon or trapped while exploring a strange dungeon, these humanoid creatures grow and move as an extension of their home dungeon. As they grow stronger they summon creatures to defend their home and call on their aid as they travel away from their home dungeon. These creatures are extremely rare and live as long as the dungeon still stands, if the Demon Fortress is destroyed in battle the dungeon is destroyed as well. If the throne is destroyed both the Demon Fortress and the dungeon are destroyed. The demon fortress can not leave the dungeon until Demon Fortress level 5.

Dungeon formation

On the ground around the Demon Fortress a stone block-like dungeon lays barren (250' by 250') with a single throne at the far end opposite of a set of wooden doors opening to the outside world. -Animated Statue is now a summon-able monster-

Dungeon Resident

The Demon Fortress can summon any number of summon-able monsters (1 hour ritual) within the dungeon with the restriction of one per day, or two per day at level 10 and higher. The Demon Fortress may have no more than three familiars. All summoned monsters will follow orders, but the Demon Fortress can only communicate casually with familiars. Each familiar receives one personality trait, one basic alignment, and one personality flaw upon summoning. -Iron, Stone, Clay, and Flesh Golems can now be summoned as familiars-

 

For one action the Demon Fortress can call one Familiar from the dungeon to his side and then return them for an additional action.

Earth Walker

The Demon Fortress can leave and enter the dungeon from anywhere within a 20 mile radius for one action. -Skeleton is now a summon-able creature-

Castle Defense

Gain the ability to set traps within the dungeon, once daily. -see Glyph of Warding and Magic Circle-

Life Long Familiars

Familiars may be healed 3d20 per long rest, Summons may be healed 2d4 per long rest. -Giant Rat can now be summoned as a summon-able creature once daily without using your daily summons-

Demon Lord

Summoning ability increase exponentially. -Abyssal Chicken, Animated Armor, Blink Dog, Cat, Dire Wolf, Flying Snake, Giant Bat, Giant Fire Beetle, Giant Mimic, Mimic, Shadowy Duplicate, Bard, and Zombie can now be summoned as summon-able creatures-

End of Loneliness

Expands the monsters that can be summoned exponentially. -Albino Dwarf Warrior, Centaur Mummy, Sea Elf, Shield Dwarf, Succubus, Unicorn, and Wood Elf Scout can now be summoned as familiars-