Astral craven

Ambusher. The Astral Craven has advantage on attack rolls against any creature it has surprised.

Fragile Regeneration. The Astral Craven regains 10 hit points at the start of each turn if it hasn't been hit with an attack this round.

Turn Resistance. The Astral Craven is immune to effects that turn undead.

Legendary Resistance (3/Day). If the Astral Craven fails a saving throw, it can choose to succeed instead.

Astral Warp. When the Astral Craven is in dim light or darkness, it can use an action to shift into the astral plane. It will remain there until the end of its next turn and it can use a bonus action to return to the material plane.

Multiattack. The Astral Craven can make two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 16 (2d10 + 5) piercing damage.

Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.

Howl (Recharge 5–6). The Astral Craven emits a bloodcurdling howl. Each creature within 30 ft. of the Astral Craven that can hear the howl must make a DC 19 Dexterity saving throw or take 9(2d8) psychic damage.

Pounce.  If the Astral Craven moves at least 25 ft. in a straight line towards a target and successfully hits with a Claw attack, the target takes an additional 9(2d8) slashing damage. The target must succeed on a DC 17 Strength saving throw or be knocked prone. If the target is knocked prone the Astral Craven can make a Bite attack against them as a bonus action.

Astral Cloak (Recharge 5–6). As a bonus action the Astral Craven wraps itself in the nothingness of the astral sea to turn invisible until it makes its next attack.

Reaction Name. Enter the description for your action.

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

Life Drain. The Astral Craven targets two creatures within 100 ft. of it. Each target must succeed on a DC 19 Constitution saving throw or 3d6 necrotic damage, and the Astral Craven regains hit points equal to the total damage dealt to both targets.

Phantasmal Force. The Astral Craven casts Phantasmal Force without need for material or verbal components.

Vile Curse (Costs 3 Actions). The Astral Craven targets one creature it can see within 30 ft. of it. The target must succeed on a DC 19 Wisdom saving throw or be magically cursed. Until the curse ends, the target has disadvantage on attack rolls and saving throws. The cursed target can repeat the saving throw at the end of each of its turn, ending the curse on a success.

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

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