Multiattack. The dragon makes three Rend attacks.
Rend. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit:12 (2d6 + 5) slashing damage plus 7 (2d6) force damage.
Time Breath (Recharge 5–6). The dragon exhales a wave of shimmering light in a 30-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 17 Constitution saving throw. On a failed save, a creature takes 31 (7d8) 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. 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 two of these saves.
These sleek dragons harness the power of time to manipulate the past, present, and future. Time dragon wyrmlings are born with shining scales and have horns that are barely more than nubs. As they master the flow of time, their horns grow with branching, rainbow-hued veins suggestive of time's paths and possibilities. Ancient time dragons can create temporal gates connected to specific times and places in the multiverse. Using these, they and allied creatures can travel anywhere in time to…