Adult Time Dragon

Huge dragon, typically neutral

Armor Class

19 (natural armor)

Hit Points

250 (20d12 + 120)

Speed

40 ft., climb 40 ft., fly 80 ft.

Saves

wis +9, con +12, dex +8, cha +11

Skills

stealth +14, arcana +12, history +18, perception +15

Senses

blindsight 60 ft., darkvision 120 ft.

Languages

all

Challenge

18

Proficiency Bonus

+6

Legendary Resistance (3/Day)

If the dragon fails a saving throw, it can choose to succeed instead.

Rreactive

The dragon can take up to three reactions per round but only one per turn.

Actions

Multiattack

The dragon makes three Rend attacks.

Rend

Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 14 (2d6 + 7) slashing damage plus 7 (2d6) force damage.

Time Breath (Recharge 5-6)

The dragon exhales a wave of shimmering light in a 60-foot cone. Nonmagical objects and vegetation in that area that aren't being worn or carried crumble to dust. Each creature in that area must make a DC 20 Constitution saving throw. On a failed save, a creature takes 36 (8d8) force damage and is magically weakened as it is desynchronized from the time stream. While the creature is in this state, attack rolls against it have advantage, and it has the poisoned condition. On a successful save, a creature takes half as much damage only. A weakened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself after it succeeds on three of these saves.