Aspect of the Fanged Tyrant

Feed on Strife. The aspect is just as adept at using fear, and hatred against its foes as Kas himself. Each creature of the aspects choice that starts its turn within 120 feet of the aspect can't be immune to the charmed, frightened, or paralyzed conditions. Whenever the aspect would cause a creature to be charmed, frightened, or paralyzed it regains 20 hit points, or gains 20 temporary hit points. Temporary hit points gained in this manner can stack.

Legendary Resistance (5/Day). If the aspect fails a saving throw, it can choose to succeed instead.

Oppressing Force. The aspects attacks are considered magical, and deal an extra 11 (2d10) psychic damage on a hit (included in the attack). Whenever the aspect deals psychic damage to a creature normally immune, that creature is instead resistant. If the aspect deals psychic damage to a creature normally resistant, is instead not resistant. Additionally, whenever a creature hits the aspect with an attack it takes 5 (1d10) psychic damage.

Sword of Kas. Each aspect and avatar of Kas wields a lesser version of the eponymous sword that he had reclaimed. The aspect adds its Charisma modifier (+9) to the result of its weapon damage rolls (included in the attack), and attacks made with the sword score a critical on rolls of 18, 19, or 20. Additionally, the aspect cast the following spells at 9th level 3/day each through the sword: cause fear, counterspell, divine word (as an action), finger of death. Finally, the aspect has advantage on Strength (Athletics) checks, Initiative rolls, and adds 1d12 to the result of its initiative rolls.

Wrath of the Destroyer (Recharges after a Short or Long Rest). If the aspect would be reduced to 0 hit points, its current hit point total instead resets to 500 hit points, it recharges its Shadowy Assault action, and it regains any expended uses of Legendary Resistance. Additionally, the aspect can now use the options in the "Mythic Actions" section for 1 hour. Award a party an additional 155,000 XP (310,000 XP total) for defeating the aspect after its Wrath of the Destroyer trait activates.

Multiattack. The aspect uses Betraying Gaze, Cease Blood Flow, or casts a spell from the Sword of Kas. It then makes four attacks: one with its Bite, one with its Shield, and two with the Sword of Kas.

Betraying Gaze. The aspect targets a creature it is aware of within 120 feet of it. The target must make a DC 26 Wisdom saving throw or become charmed until the end of the aspects next turn. While charmed in this manner, an affected creature cannot take any hostile actions towards the aspect and must do everything in its power to slay the ally nearest to it. On a successful save, an affected creature takes 20 (2d10 + 9) psychic damage.

Bite. Melee Weapon Attack: +18 to hit, reach 5 ft., one target. Hit: 23 (1d10 + 18) piercing damage plus 11 (2d10) psychic damage. If the target is a living creature, it loses 13 (2d12) hit points and the aspect regains the same number of hit points. If the target is under the effects of a beneficial potion, or spell, that effect ends on the target and benefits the aspect for the remainder of its duration.

Cease Blood Flow. The aspect targets a living creature it is aware of within 120 feet of it that has blood, or an equivalent substance flowing through its body. The target must make a DC 26 Constitution saving throw or be paralyzed for 1 minute as the aspect causes all of the blood in the targets body to cease flowing. An affected creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. On a successful saving throw, an affected creature lose 11 (2d10) hit points as the aspects only siphons blood from its form.

Shield. Melee Weapon Attack: +18 to hit, reach 5 ft., one target. Hit: 21 (1d6 + 18) bludgeoning damage plus 11 (2d10) psychic damage. If the target is a creature of Huge size or smaller, it is knocked prone.

Sword of Kas. Melee Weapon Attack: +18 to hit, reach 5 ft., one target. Hit: 24 (1d12 + 18) slashing damage plus 11 (2d10) psychic damage. If the attack is a critical, and the target has a head, it must make a DC 20 Constitution saving throw. On a failed saving throw, the target dies as the aspect decapitates it.

Shadowy Assault (Recharge 5-6). The aspect enters a wraith-like state and teleports throughout the battlefield, lashing out at at its foes. The aspect targets a creature it is aware of within 120 feet of it and teleports to an unoccupied space adjacent to that creature, making a Sword of Kas against that creature. If the attack hits, the aspect can teleport in this manner twice more.

Change Shape. The aspect transforms into a bat, wolf, or a wraith-like entity gaining different benefits based on the form it takes. As a bat, the aspect gains a flying speed of 60 feet, it can't make attacks other than Bite attacks, and its flying speed doesn't provoke attacks of opportunity. As a wolf, the aspects walking speed increases to 80 feet, it can only make Bite attacks, and its Bite attack knocks a target prone if it fails a DC 26 Strength saving throw. As a wraith, the aspect gains a hover speed of 80 feet, all of its attacks deal psychic damage rather than their normal damage, and the aspect gains vulnerability to radiant damage.

Terrifying Smite. The aspect empowers the next attack it successfully hits a creature with. The attack deals an extra 18 (4d8) thunder damage, and the target must make a DC 26 Strength and Wisdom saving throw. On a failed Strength saving throw, the target is launched 60 feet backwards landing prone. On a failed Wisdom saving throw, the target is frightened of the aspect until the end of its next turn. The target suffers no detrimental effects on successful saving throws.

Punish Cowardice. As a reaction to a creature using the Dash action, or a flying speed to move away from the aspect, it can magically lash out at that creature for its cowardice. The target must make a DC 26 Strength saving throw, having it speed reduced to 0 until the end of the aspects next turn.

The aspect can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The aspect regains spent legendary actions at the start of its turn.

Strike. The aspect makes an attack with the Sword of Kas.

Might of the Fanged Tyrant (Costs 2 Actions). The aspect uses Betraying Gaze, or Cease Blood Flow.

If the aspect's Wrath of the Destroyer trait has activated in the last hour, it can use the options below as legendary actions.

Destroyer's Whirlwind (Costs 2 Actions). The aspect spins and pirouettes, lashing out with its sword at those around it. Each creature of the aspects choice within 20 feet of it must make a DC 26 Dexterity saving throw taking  35 (4d12 + 9) slashing damage plus 26 (4d12) psychic damage on a failed save, or half as much on a successful one.

Drain Life (Costs 3 Actions). The aspect targets a living creature it can see within 120 feet of it. The target must make a DC 26 Constitution saving throw losing 64 (10d10 + 9) hit points and have disadvantage on ability checks and attack rolls until the end of the aspects next turn on a failed saving throw, or lose half as much hit points and suffer no other detrimental effect on a successful one.