Dragon, Prismatic Ancient
Gargantuan Dragon, neutral (CR 21)Armor Class 20 natural armor
Hit Points 407 (22d20+176)
Speed 50 ft., climb 40 ft.
25 (+7)
10 (+0)
27 (+8)
20 (+5)
17 (+3)
19 (+4)
Skills perception 3
Senses blindsight 60', darkvision 120', passive Perception 27
Languages Common, Draconic
Challenge Rating 21
Actions
Multiattack.
Uses Frightful Presence then one Bite and two Claws.
Bite.
Melee Weapon Attack: +14 to hit, 15 ft., one target, 18 (2d10+7) piercing damage.
Claw.
Melee Weapon Attack: +14 to hit, 10 ft., one target, 14 (2d6+7) slashing damage.
Tail.
Melee Weapon Attack: +14 to hit, 20 ft., one target, 16 (2d8+7) bludgeoning damage.
Frightful Presence.
All it picks within 120' and aware of it frightened 1 min (DC 19 Wis negates) Can re-save at end of each of its turns. Save/effect ends: immune 24 hrs.
Breath Weapon (Recharge 5–6).
Uses one of the following:Light Beam. Emits beam of white light in a 120' line that is 10 ft. wide. Each creature in line: 90 (20d8) radiant (DC 23 Dex half).Rainbow Blast. Emits multicolored light in 90' cone. Each creature in area: 72 (16d8) damage (DC 23 Dex half). Dragon splits damage among acid cold fire lightning or poison choosing a number of d8s for each type totaling 16d8. Must choose at least two types.
Spellcasting.
Int (DC 20) no material components: At will: charm person dancing lights prismatic spray1/day: prismatic wall
sizeGargantuan
typeDragon
group
alignmentneutral
strength_save
dexterity_save7
constitution_save1
intelligence_save
wisdom_save1
charisma_save1
perception3
damage_vulnerabilities
damage_resistances
damage_immunitiesradiant
condition_immunitiesblinded
cr21
reactions
legendary_desc
legendary_actionsname: Detect,desc: Makes a Wis (Perception) check.,name: Tail Attack,desc: Makes a tail attack.,name: Cast a Spell (2),desc: Uses Spellcasting.,name: Shimmering Wings (2),desc: Each creature within 20': DC 19 Wis save or take 16 (3d10) radiant and blinded until start of its next turn.
special_abilitiesname: Legendary Resistance (3/Day),desc: Choose to succeed failed save.
spell_list
page_no140
document__license_urlhttp://open5e.com/legal
document__slugtob3
document__titleTome of Beasts 3
document__urlhttps://koboldpress.com/kpstore/product/tome-of-beasts-2-for-5th-edition/
Find the complete stats on: Open5e
Tome of Beasts 3, page no. 140