Agus Thorn

Infernal Savant

Agus Thron has advantage on Arcana checks related to fiends, curses, soul magic, and immortality.

Prototype Immortality

When Agus would be reduced to 0 hit points, he instead drops to 1 hit point and releases a surge of unstable infernal magic (once per day). Each creature within 15 feet must make a DC 18 Constitution saving throw, taking 21 (6d6) necrotic damage on a failure, or half on a success.

After this triggers, Agus gains one level of exhaustion.

Master of Experiments

Agus has advantage on saving throws against spells and magical effects that would restrain, paralyze, or polymorph him.

Spellcasting

Agus Thron is a 15th-level spellcaster (Charisma is his spellcasting ability, spell save DC 18, +10 to hit with spell attacks).

At will

• detect magic

• mage hand

• thaumaturgy

• chill touch

3/day each

• blight

• counterspell

• fireball

• fear

• blight

1/day each

• finger of death

• blight (at 6th level)

• plane shift (self only)

• soul cage

Infernal Scalpel

Melee Weapon Attack: +7 to hit, reach 5 ft., one target
Hit: 9 (2d6 + 2) slashing damage plus 14 (4d6) necrotic damage
If the target is reduced to 0 hit points by this attack, Agus can immediately cast soul cage on the creature without expending a spell slot.

Black Ichor Injection (Recharge 5–6)

Agus hurls a vial of experimental fluid at a point he can see within 30 feet. The vial shatters in a 10-foot-radius sphere.

Creatures in the area must make a DC 18 Constitution saving throw or take 27 (6d8) necrotic damage and be poisoned for 1 minute. A poisoned creature can repeat the save at the end of each of its turns, ending the effect on a success.

If Vayne is in the area, he instead gains advantage on his next attack roll or saving throw as the ichor resonates with him.

Reactions

Experimental Countermeasure

When Agus is hit by an attack, he can reduce the damage by 15 (3d10) as infernal sigils flare across his body (3/day).

Legendary Actions (3 per round)

Agus Thron can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time.

Cantrip

Agus casts a cantrip.

Infernal Step

Agus magically teleports up to 30 feet to an unoccupied space he can see.

Accelerated Research (Costs 2 Actions)

Agus regains one expended spell slot of 3rd level or lower.

Terminate Prototype (Costs 3 Actions)

Agus targets a creature affected by necrotic damage within the last round. The creature must make a DC 18 Constitution saving throw or take 22 (4d10) necrotic damage and be restrained until the end of its next turn as shadowy tendrils bind them.

Mythic Action Name. Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.