Ancient Red Dragon
Gargantuan dragon, chaotic evil
Armor Class 22 (natural armor)
Hit Points 507 (26d20 + 234)
Speed 40 ft., fly 80 ft., swim 20 ft., climb 40 ft.
str
30 (+10)
dex
10 (+0)
con
29 (+9)
int
18 (+4)
wis
15 (+2)
cha
27 (+8)
Saving Throws Dex +7, Wis +9
Skills Perception +16, Stealth +7
Damage Immunities fire
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 26
Languages Common, Draconic
Challenge 24 (62,000 XP)
Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Fire Breath. Dexterity Saving Throw: DC 24, each creature in a 90-foot Cone. Failure: 91 (26d6) Fire damage. Success: Half damage.
Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Scorching Ray (level 3 version).
Rend. Melee Attack Roll: +17, reach 15 ft. 19 (2d8 + 10) Slashing damage plus 10 (3d6) Fire damage.
Spellcasting. The 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, Detect Magic, Scorching Ray - **1/Day Each:** Fireball, Scrying
Spellcasting (CHA, DC 23, +15 to hit)
At Will: Command, Detect Magic, Scorching Ray
1/Day Each: Fireball, Scrying
Attack Summary
Legendary Actions
The ancient red dragon 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 ancient red dragon regains spent legendary actions at the start of its turn.
Commanding Presence. The dragon uses Spellcasting to cast Command (level 2 version). The dragon can't take this action again until the start of its next turn.
Fiery Rays. The dragon uses Spellcasting to cast Scorching Ray (level 3 version). 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 one Rend attack.