Dexterity +7, Wisdom +9
Perception +16, Stealth +7
+14
Blindsight 60 ft, Darkvision 120 ft
Common, Draconic
Fire
Traits
Legendary Resistance
4/day (5/day in lair). If the ancient red dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack
The ancient red dragon makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Scorching Ray (level 3 version).
Rend
Melee Weapon Attack: +17 to hit, reach 15 ft.. Hit: 19 (2d8 + 10) slashing plus 10 (3d6) fire damage.
Fire Breath
Recharge 5–6. Dexterity Saving Throw: DC 24, each creature in a 90-foot Cone
Failure: 91 (26d6) fire damage.
Success: Half damage.
Spellcasting
1 use per day. The ancient red dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 23, +15 to hit with spell attacks):
At Will: Command (level 2 version), Detect Magic, Scorching Ray (level 3 version)
1/Day Each: Fireball (level 6 version), Scrying
Legendary Actions
3 legendary actions (4 in its lair). Only one legendary action can be used at a time and only at the end of another creature's turn. This creature regains spent legendary actions at the start of its turn.
Commanding Presence
The ancient red dragon uses Spellcasting to cast Command (level 2 version). The ancient red dragon can't take this action again until the start of its next turn.
Fiery Rays
The ancient red dragon uses Spellcasting to cast Scorching Ray. The ancient red dragon can't take this action again until the start of its next turn.
Pounce
The ancient red dragon moves up to half its Speed, and it makes one Rend attack.
Prepared Spells
Command, Scorching Ray, Command, Detect Magic, Scorching Ray, Fireball, Scrying
Creature Rules
Red Dragons