Armor Class
21
Ancient Copper Dragon
Gargantuan Dragon · Chaotic Good
Hit Points
367 (21d20 + 147)
Speed
Walk 40 ft., Climb 40 ft., Fly 80 ft.
CR
21
Traits
Legendary Resistance (4/Day, or 5/Day in Lair)
If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack
The dragon makes three Rend attacks. It can replace one attack with a use of (A) Slowing Breath or (B) Spellcasting to cast (level 5 version).
Rend
Melee Attack +15, reach 15 ft. 19 () Slashing damage plus 9 () Acid damage.
Slashing
AcidAcid Breath Recharge 5
DEX Save DC 22, each creature in an 90-foot-long, 10-foot-wide Line [Area Of Effect].
Failure: 63 () Acid damage.
Success: Half damage.
Failure: 63 () Acid damage.
Success: Half damage.
Slowing Breath
CON Save DC 22, each creature in a 90-foot Cone [Area Of Effect].
Failure: The target can't take Reactions; its Speed is halved; and it can take either an action or a Bonus Action on its turn, not both. This effect lasts until the end of its next turn.
Failure: The target can't take Reactions; its Speed is halved; and it can take either an action or a Bonus Action on its turn, not both. This effect lasts until the end of its next turn.
Legendary Actions
Giggling Magic
CHA Save DC 21, one creature the dragon can see within 120 feet.
Failure: 31 () Psychic damage. Until the end of its next turn, the target rolls whenever it makes an ability check or attack roll and subtracts the number rolled from the D20 Test.
Success or Failure: The dragon can't take this action again until the start of its next turn.
Failure: 31 () Psychic damage. Until the end of its next turn, the target rolls whenever it makes an ability check or attack roll and subtracts the number rolled from the D20 Test.
PsychicSuccess or Failure: The dragon can't take this action again until the start of its next turn.
Mind Jolt
The dragon uses Spellcasting to cast (level 5 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.