Adult Red Dragon (Updated)

Legendary Resistance (3/Day, or 4/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.

Apex Predator (Inherent). All condition effects triggered by spells under 4th level are nullified. Damage from spells is treated as per cast spells description if not countered.

Multiattack. The dragon makes Two Rend attacks. It can replace one attack with a use of Spellcasting to cast Scorching Ray.

Rend. Melee Attack Roll: +14, reach 10 ft. Hit: 24 (3d10 + 8) Slashing damage plus 8 (3d4) Force damage.

Dragon Breath (Recharge 5–6). Dexterity Saving Throw: DC 25, each creature in a 60-foot Cone. Failure: 72 (16d8) Force/DragonFire damage. Success: Half damage.

Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 20, +14 to hit with spell attacks):

At Will: Command (level 2 version), Detect Magic, Scorching Ray
2/Day: Fireball

At Will: (2/day): Counterspell (level 4 version), Counterspell.

Legendary Action Uses: 3 (4 in Lair). Immediately after another creature’s turn, the dragon can expend a use to take one of the following actions. The dragon regains all expended uses at the start of each of its turns.

Commanding Presence. The dragon uses Spellcasting to cast Command (level 4 version). The dragon can’t take this action again until the start of its next turn.

Plated Scales. The dragon utilizes its thick scales to reduce all incoming physical damage, reducing it by its CON score modifier. The dragon can’t take this action again until the start of its next turn.

Pounce. The dragon moves up to half its Speed, and it makes two Rend attacks.