Order of the Nightblades

-Might of Hell:
You use the unique blood of one of five malevolent creatures.
Not unsimilar to warlocks, your powers are based on the entitie's affinities.
And also like with warlocks, if you were to lower your guard, the entity might overtake.

Blood of Hostile Planes

3rd-level Order of the Nightblades feature

The proof of your new status, etched onto your torso, above the heart, the mark of the entity.
Made from their darkened blood itself.

.Anshoop the Wraith (banshee)
A blind eye between pointy teeth. You have resistance to necrotic damage.

.Freigiri the Heartless (silver dragon)
A shattered snowflake. You have resistance to cold damage.

.Gablias the Conflagrant (malakbel demon)
A charred skull. You have resistance to fire damage.

.Indura the Thunderous (lightning hulk)
The japanese word for storm, jagged. You have resistance to lightning damage.

.Ocaimon the Abyssal (aboleth spawn)
A circle of tentacles. You have resistance to psychic damage.

Personal Spells

7th-level Order of the Nightblades feature

-You learn a lvl 3 spell of your entity, using your INT modifier.
Available twice per long rest. Thrice per long rest at lvl 14.

.ANSHOOP: You cast the Draining Claws (Vampiric Touch) spell.
.FREIGIRI: You cast the Hailing Cry (lvl 3 Dragon's Breath, cold) spell.
.GABLIAS: You cast the Pyrosphere (Fireball) spell.
.INDURA: You cast the Electrical Spearthrow (Lightning Bolt) spell.
.OCAIMON: You cast the Faint Menace (lvl 3 Dissonant Whispers) spell.

Day's End Armament

11th-level Order of the Nightblades feature

Available once per long rest, for 30 min total, you manifest a weapon tailored to the entity's style.
You can extend the duration by calling it back when not using it at the moment.
(You'll have to keep track of the spent & remaining minutes.)

-Bitter Polearm of Ocaimon
You wield a halberd charged with grudge.
On a critical hit, the target ends up afraid.

-Combustion Blade of Gablias
You wield a fiery glaive that cauterizes wounds.
On a critical hit, a small explosion repels the target 12 ft/4 m back.

-Dull Teeth of Anshoop
You wield a negative trident.
On a critical hit, the target is blinded.

-Fulminating Juggernaut of Indura
You wield an electrified war pick.
On a critical hit, the target ends up paralyzed.

-Numbing Dart of Freigiri
You wield a winter-cold rapier.
On a critical hit, the target is slowed down to 16 ft/5 m by sprouting ice.

Sharing the Boon

15th-level Order of the Nightblades feature

A cooperation move, activated by pressing the seal on your torso and touching a consenting creature.
You lend your power by granting a buff of your entity's attribute.
If the assisted spell is of the same attribute, they gain another 1d6 of damage.
If the assisted spell is of a different attribute, you add 1d10 of said shared damage.

Supreme Domain

18th-level Order of the Nightblades feature

Gathering all of your entity's powers into this 1 technique.
You cast a modified version of the Hallow spell for 1 min maximum, in a 26 ft/8 m radius.
During the process, the silhouette of your entity wraps you.

"By my blood and rank: be frozen and broken immediately."
-Motion-Seizing Inferno: (Freigiri)
You manifest a wide plateau of frozen soils.
You cast and maintain the Wall of Ice spell for 9 turns.

"By my blood and rank: let the enemy fall into the nothingness."
-Phobia of Endless Depths: (Ocaimon)
You plunge the surroundings in the depths of a dark ocean.
You cast the Mental Prison spell, with advantage.

"By my blood and rank: forget the illusion of awakening."
-Restless Ailing Nightmare: (Anshoop)
You trap the target into an opaque mass of darkness.
You cast the lvl 5 Inflict Wounds spell, for 9 turns.

"By my blood and rank: all of creation will break and melt."
-Seething Heart of Volcano: (Gablias)
You move the target into the dead-center of an active volcano.
You cast the Immolation spell.

"By my blood and rank: strike by thousands, blinding lightnings."
-Tearing Black Sky: (Indura)
You and the target are elevated into a violent cumulonimbus.
You cast the lvl 6 Call Lightning spell, for 9 turns.