Walker

Folly. Every time throughout the campaign, every time there is a natural 1 rolled, excluding the lower roll with advantage, roll 1d6. Add 1 to the appropriate ability score: 1-STR, 2-DEX, 3-CON, 4-INT,  5-WIS, 6-CHA.

Legendary Resistance (4/Day). If the Walker fails a saving throw, it can choose to succeed instead

Regeneration. The Walker reforms within 1 mile of where it was slain in 1d6 days.

Sorcery Points. The Walker has 10 sorcery points to use with its' metamagic options.

Metamagic. The Walker has the option of using the following options when casting a spell:

Distant Spell-  When you cast a spell that has a range of 5 ft. or greater, you can spend 1 sorcery point to double the range of the spell (or make the range 30 ft. for a spell with a range of touch).

Empowered Spell- When you roll damage for a spell, you can spend 1 sorcery point to reroll up to 6 of the dice. You must use the new rolls and you can use this option even if you've already used another Metamagic option.

Transmuted Spell- When you cast a spell that deals a type of damage from the following list, you can spend 1 sorcery point to change that damage type to one of the other listed types: acid, cold, fire, lightning, poison, thunder.

Spellcasting. The Walker is a 10-level spellcaster. Its spellcasting ability is Charisma (spell save DC 20, +12 to hit with spell attacks). The Walker has following Sorcerer and Paladin spells prepared:

Cantrips (at will): Acid Splash, Eldritch Blast, Fire Bolt, Sword Burst, and Thunderclap
1st level (4 slots): Chromatic Orb, Command, Cure Wounds, Hellish Rebuke, Inflict Wounds, Searing Smite, Thunderous Smite, Thunderwave, Wrathful Smite

2nd level (4 slots): Branding Smite, Crown of Madness, Darkness, Find Steed, Invisibility, Shadow Blade 

3rd level (3 slots): Animate Dead, Ashardalon's Stride, Aura of Vitality, Bestow Curse, Counterspell, Fireball, Fly

4th level (3 slots): Dimension Door, Sickening Radiance

5th level (3 slots): Animate Objects, Telekinesis (At Will)

6th level (2 slots):

7th level (1 slots): 

8th level (1 slots): 

Multiattack. The walker makes two melee weapon attacks, and casts a spell.

Longsword. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 9 (2d8 + 1) slashing damage. 

The Walker 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 Walker regains spent legendary actions at the start of its turn

Attack (Costs 1 Actions). The Walker makes two melee weapon attacks. 

Spell (Costs 2 Actions). The Walker targets an enemy within range, and casts a spell. 

Visage of Death (Costs 3 Actions). Each creature of your choice that can see you within 30 ft. must make a WIS saving throw (DC 20). On failure, the target is frightened of you for 1 minute. If it moves more than 30 ft. from you, it can attempt another saving throw.