Uxie

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

Amphibious: The Uxie can breathe air and water.

Being of Knowledge: Once per day, as an action, the Uxie can choose a creature within 60 feet that has an Intelligence score of 6 or higher and either bestow it new knowledge or destroy its current knowledge. An unwilling target can make a DC 20 Wisdom saving throw, becoming immune to this effect for 48 hours on a successful save.

• Bestow Knowledge: The target is gifted with a century's worth of new information. The target's Intelligence and Wisdom scores increase by +5 each, has advantage on all Intelligence ability checks and saving throws and gains the ability to perfectly recall anything they have seen, heard, spoken or written within the past year for 1 month. If a creature that has previously been bestowed knowledge is targeted by the Uxie's Destroy Knowledge during the duration, these effects end early and their knowledge returns to normal.
• Destroy Knowledge: The target's prior knowledge and intellect is shattered. The target's Intelligence and Wisdom scores decrease by -5 each, has disadvantage on all Intelligence ability checks and saving throws and cannot recall anything that has happened to them within the past month for 1 month. Additionally, the target is unable to learn any new information for 1 week. At the end of every 24 hours, the creature can repeat its saving throw against this effect. If it succeeds, the effect ends and their intelligence is restored. The effect can also be ended by greater restoration, heal, or wish. If a creature whose knowledge has previously been destroyed is targeted by the Uxie's Bestow Knowledge during the duration, these effects end early and their knowledge returns to normal.

Detect Intelligence: The Uxie can sense the presence and location of any creature within 600 feet of it that has an Intelligence score of 3 or higher and that speaks at least one language, regardless of imposing barriers, unless the creature is immune to being detected this way through a spell or trait. It knows the Intelligence score and alignment of any creature that it can sense this way.

Erasing Gaze: When a humanoid that can see the Uxie's eyes starts its turn within 30 feet of the Uxie, the Uxie can force it to make a DC 25 Wisdom saving throw if the Uxie can see the humanoid. On a failed save, the creature is affected as per the feeblemind spell and forgets anywhere between the previous 24 hours to 10 years (the Uxie chooses how much the target forgets). The Uxie can open its eyes for up to 1 minute every month.

Guardian of the Lake: The Uxie knows the exact location of Azelf and Mesprit while any are on the same plane of existence, and can sense what they sense. The Uxie ignores the range restriction on its telepathy when communicating with them, though it can't extend into other planes of existence.

Flyby: The Uxie doesn't provoke opportunity attacks when it flies out of an enemy's reach.

Immutable Form: The Uxie is immune to any spell or effect that would alter its form.

Innate Spellcasting (Psionics): The Uxie's innate spellcasting ability is Intelligence (spell save DC 23, +15 to hit with spell attacks). It can innately cast the following spells, requiring no components:
At will: arcanist's magic aura, clairvoyance, detect thoughts, identfy, major image, silence, tongues, zone of truth
3/day each: arcane eye, awaken, modify memory, scrying
1/day each: foresight, mind blank, mirage arcane

Knowledge Recall: The Uxie can perfectly recall anything it has seen or heard within the past century.

Levitate: The Uxie ignores ground-based difficult terrain and spells.

Magic Resistance: The Uxie has advantage on saving throws against spells and other magical effects.

Shielded Mind: The Uxie is immune to scrying and to any effect that would sense its emotions, read its thoughts, or detect its location, unless it allows it.

Confusion: Ranged Spell Attack: +15 to hit, range 60 ft., one creature. Hit: 18 (2d8 + 9) psychic damage and the target must succeed at a DC 18 Wisdom saving throw. On a failed save, the target is confused (as per the confusion spell) until the end of its next turn.

Endure: If the Uxie would be reduced to 0 hit points before the end of the round, it drops to 1 hit point instead. For every consecutive use of this action, roll a d20, the DC being 5 + an additional 5 for every consecutive use after the first. On a failure, this action fails and is wasted.

Extrasensory: Ranged Spell Attack: +15 to hit, range 60 ft., one creature. Hit: 25 (3d10 + 9) psychic damage and the target must succeed at a DC 17 Constitution saving throw. On a failed save, the target is stunned until the end of their next turn.

Flail: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d10 + 2) bludgeoning damage, or 18 (3d10 + 2) bludgeoning damage if the Uxie has half its maximum hit points or fewer, or 24 (4d10 + 2) bludgeoning damage if the Uxie has a quarter of its maximum hit points or fewer.

Mystical Power (Recharge 5-6): Ranged Spell Attack: +15 to hit, range 60 ft., one target. Hit: 25 (3d10 + 9) psychic damage. If the attack hits and the Uxie's Strength score is higher than its AC, each of its attacks deal an additional die of damage for 1 minute. Otherwise, it gains +1 to its AC for 1 minute.

Yawn: The Uxie chooses one creature within 60 feet that can see it. The target must succeed at a DC 18 Wisdom saving throw or become drowsy, taking a -1 penalty to their AC and attack rolls and having their movement reduced by 10 feet. At the start of the target's next turn, if they failed the saving throw, they must repeat the saving throw. On a success, the target is no longer drowsy. On a failed save, the target falls unconscious for 1 minute or until they take damage or someone uses an action to shake or slap the target awake.

The Uxie 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 Uxie regains spent legendary actions at the start of its turn.

Amnesia: The Uxie can roll a 1d4 and add it to its next saving throw made against a spell or magical effect.

Memento (Costs 2 Actions): The Uxie targets a creature within 60 feet and reduces its own number of hit points by an amount equal to a quarter of its hit point maximum. The target gains disadvantage on all attack rolls, saving throws made against spells or magical effects and has disadvantage on Constitution saving throws made to maintain concentration on spells for 1 minute. The Uxie can reduce its hit point before or after it chooses its target.

Teleport: The Uxie teleports, along with any equipment it is wearing or carrying, up to 120 feet to an unoccupied space it can see.